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9) Standardized Assessment Practice - Choose the best answer.
A chemist is identifying the elements found in a newly discovered sea sponge. Which can be used to identify a particular element?
number of electrons
number of protons
number of neutrons
size of the atom
10) Standardized Assessment Practice - Choose the best answer.
How many protons, neutrons, and electrons are present in an atom of radium with an atomic number of 88 and an atomic mass of 226?
88 protons, 138 neutrons, 88 electrons
75 protons, 76 neutrons, 75 electrons
88 protons, 88 neutrons, 138 electrons
138 protons, 88 neutrons, 88 electrons
Answers
(9) The number of protons can be used to identify a particular element. The correct option is (2). (10) 88 protons, 138 neutrons, and 88 electrons are present in an atom of radium with an atomic number of 88 and an atomic mass of 226. The correct option is (1).
(9)
The number of protons in an atom, known as its atomic number, is a unique identification for a certain element. Each element has a unique number of protons in its nucleus, which determines its chemical properties and position on the periodic table. This attribute is critical for identifying and classifying items.
Hence, the number of protons can be used to identify a particular element. The correct option is (2).
(10)
Radium has an atomic number of 88, which implies it possesses 88 protons. The number of protons in an element is defined by its atomic number.
Radium has an atomic mass of 226 which signifies the total number of protons and neutrons in the nucleus.
Since radium has 88 protons, the difference between the atomic mass and the atomic number yields the number of neutrons: 226 − 88 = 138.
Because an atom is electrically neutral, it has the same number of protons and electrons. As a result, radium possesses 88 electrons.
Hence, 88 protons, 138 neutrons, and 88 electrons are present in an atom of radium with an atomic number of 88 and an atomic mass of 226. The correct option is (1).
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Related Questions
Create your own real world example of how the application of they scientific discovery has help create a new technology
Answers
Scientific discovery has helped create new technology which is pretty evident from the different technological products we are using in our day-to-day life such as mobile phones, computers, nuclear power plants, and other technological advancements.
What is science?Science is the methodical, empirically-based pursuit and application of knowledge and understanding of the natural and social worlds.
A method of learning about the world is science. Science allows people to participate in the creation of new knowledge as well as use that knowledge to further their goals. It is both a process, a product, and an institution.
The various technical items we use in our daily lives, such as mobile phones, computers, nuclear power plants, and other technological breakthroughs, are very strong evidence that scientific research has contributed to the creation of new technology.
Thus, by the above-mentioned example, we can say that scientific discovery has helped create new technology.
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What did the solar system form from?
O clouds of dust and gas
O preexisting planets
O black hole
O comets
Answers
Answer:
O clouds of dust and gas
Explanation:
Study the dashed arrows in the image.
A diagram of the Earth rotating on its axis. A red horizontal line through the center of the Earth shows the Equator. A double headed arrow runs vertically through the center of the Earth and is labeled Intended path. A line begins at the bottom right of the Earth, curves to pass through the center, and ends in the top right.
What causes the arrows to move in this direction?
Earth rotating
air moving to the poles
Earth’s equator
wind moving over short distances
Answers
Answer:
What the guy above me said
Explanation:
peepee poopoo yeah
The thing that causes the arrows to move in the given specific direction is known as the rotation of the earth on its axis. Thus, the correct option for this question is A.
What is the importance of an equator?The importance of an equator is determined by the fact that it is a reference point for navigation. It is just an imaginary line that significantly divides the Earth into two equal halves, and it forms the halfway point between the South Pole and the North Pole at 0 degrees latitude.
The rotation of the earth on its axis causes the specific area of its surface gets a turn to face and be warmed by the sun due to direct exposure. This is important to all life on Earth.
The sun affects everything from the weather we experience to the food we eat, and even our health. Due to this, a line begins at the bottom right of the Earth, curves to pass through the center, and ends in the top right.
Therefore, the thing that causes the arrows to move in the given specific direction is known as the rotation of the earth on its axis. Thus, the correct option for this question is A.
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A car travels for 8 hours at a speed of 62 miles per hour. How far did the car travel?
Answers
Answer:
The car traveled 496 miles
62x8=496
Hope this helped!
Please Help Me!!!!!!
Answers
Answer:
C: Electrical to chemical
the electricity turns into chemical energy to light the candle.
Britney suspended a bar magnet and tried to check if thin iron clips would hang from it. He kept hanging them one after another, till no more pins would hang. He tried it at 5 places as shown in the figure.
Britney made the following conclusions from the experiment.
1. The magnetic attraction is powerful at the poles and weaker as we go towards the centre.
2. A bar magnet when freely suspended, always points towards the NS direction.
3. Between P and Q and between S and T, the magnet will not attract any iron clips.
4. All the pins shown in the figure behave like magnets.
Which of these are VALID conclusions?
Answers
Answer:the answer is 1
Explanation:
Because the force is weaker in the middle of the magnet and halfway between the pole and the center.
I need help on this please!
Answers
Answer:
i think it is no interference
Explanation:
because both of the arrows haven't interfered. If you look up some of the pictures of each answer choice that is on your question, it will have that picture shown.
Explain what happens as the heart grows bigger.
Answers
Initially, the heart may grow bigger as a compensatory mechanism to try to keep up with increased demands for blood and oxygen. For example, if a person engages in regular exercise, their heart may enlarge to accommodate the increased demand for blood and oxygen to the muscles.
However, if the heart continues to grow over time, it can become less efficient at pumping blood and may develop structural abnormalities that increase the risk of heart failure, arrhythmias, and other complications.
In some cases, cardiac hypertrophy may be reversible if the underlying cause is treated, such as by managing high blood pressure or heart disease. However, if left untreated, hypertrophy can lead to irreversible damage to the heart muscle and may require more aggressive interventions, such as medication, surgery, or other medical procedures to manage the condition.
Question about generators and electrical currents. Please, no absurd answers! Thank you
Answers
pleeaseeee helllp A geologist finds a large rock containing a fern fossil. This kind of fern grew on land in hot, moist climates.
What does this tell the geologist about the area at the time the rock was formed?
The area was covered by an ocean.
The area was muddy and wet.
The area was hot and tropical.
The area was snowy and cold.
Answers
Answer: The area was hot and tropical.
Explanation:
Which of these statements describe friction? Check all that apply. Friction allows objects to slide over each other without any resistance. Friction resists motion. Friction is a force that acts from a distance. Friction is a contact force. Friction is caused by microscopic bumps and ridges on surfaces.
i'll give you a brainlest!
Answers
Answer:
→ Friction resists motion
→ Friction is a contact force.
→ Friction is caused by microscopic bumps and ridges on surfaces.
Explanation:
As the normal force, the friction is a contact force because it result when two objects interact by a direct contact, that is, touching to each other. Friction is important in everyday life and resists motion. For example, the oil in a car engine minimizes friction between moving parts, but a car can move because the friction between the tires and the road, but what about the microscopic level? well, as the normal forces friction forces result from the intermolecular forces between two rough surfaces at points where they come into contact and they are electrical in nature.
Is horsepower the only thing to be considered when purchasing a piece of equipment?Explain.
Answers
Answer:
Mostly yes
Explanation:
But you should consider,brand value, material used and lasting of the equipment also
1HP=720WHP stands for horsepower
It's mostly used in pumps
When is the best time to take RHR (Resting Heart Rate)?
Question 2 options:
After running
First thing in the morning
After eating a big dinner
none of the above
Answers
Answer:
First thing in the morning
Explanation:
Stay safe, stay healthy and blessed.
Have a great day !
Thank you
Another class received similar data to what we saw yesterday. Their investigation found that it looks like water enters a plant through the roots and exits through the leaves when light shines on it. Below are three students’ claims to answer the question “what happens to the water inside the plant?”
They have collected the same evidence as our class. Using the things we have done in class so far, provide written feedback to each student. Your feedback should identify what evidence could be used to support their claim. How does the evidence you have in your Thinking Deeper Documents, support (or not support) their claims? Think of ALL the things we’ve done so far in this unit and ALL of the videos we’ve seen.
Student A: The same water molecules that come into the plant through the roots go out of the plant through the leaves. They just flow through the plant without changing.
What evidence supports students A’s claim?
Do you agree or disagree with student A? Why or why not?
Student B: The water molecules that go into the plant are used to make food molecules, and other chemical reactions in the plant form water molecules that come out of the leaves.
What evidence supports students B’s claim?
Do you agree or disagree with student B? Why or why not?
Answers
Answer:
a
Explanation:
What two gases in the atmosphere do animals and plants need to breathe and grow?
Answers
Answer: Explanation:
Plants and animals each produce the gases that the other needs to live. Plants need carbon dioxide—people and other animals exhale carbon dioxide as a waste product. People and other animals need oxygen—plants produce oxygen during an important process called photosynthesis, which turns the sun's energy into nutrients.
How will the total energy change as the car moves from point A to B to C? Assume that none of the energy is lost as friction or heat energy.
A The total energy will increase as the kinetic changes to potential and back again.
B Kinetic energy will change into potential energy and back again, but the total energy will stay the same.
C The total energy will decrease because the potential energy will change into kinetic energy.
D The total energy will decrease since it is losing potential energy at point E.
Answers
Answer:c
Explanation: i am on study island and had that
What is the total force acting on the ball in the diagram? How would you describe its velocity?
Answers
Answer:
Velocity formulae should be used in order to know the answer
Answer:
Velocity Formula is the answer
Lab Report
Motion and Forces
It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U4_ Lab_MotionAndForces_Alice_Jones.doc).
Introduction
What was the purpose purpose of the experiment?
The purpose of the experiment is to test the hypothesis.
What were the independent, dependent, and control variables in your investigation? Describe the variables for each part of the experiment.
Write a hypothesis based on observations and scientific principles.
Type your answer here:
Experimental Methods
What tools did you use to collect your data?
Questionnaires and observations.
Write your procedure. List each step so that another student could follow the procedure and repeat your experiment.
Type your answer here:
Data and Observations
Record your observations.
Type your answer here:
Conclusions
What conclusions can you draw about how the sum of forces acting on an object affect its motion? Write an evidence-based claim.
Type your answer here:
Which mass, A, B, or C, was the greatest? Use the observations from your experiment and your knowledge of Newton’s laws of motion to write an evidence-based claim.
Type your answer here:
Make a model that shows the forces acting on two blocks on a flat, frictionless surface:
A 1 N block at rest
A 1 N block with 2 N of force applied in one horizontal direction
Include arrows to represent the forces and labels to indicate the magnitude of each force. Use your model to compare and explain the motion of each block.
Type your answer here:
Answers
Answer's C
Explanation: The matter that surrounding this whole planet or time and frequencies the motion and forces that people can't determine unless made a hypothesis
list both types of energy before skydiver jumps out of the plane and as the sky diver is diving.
Answers
Answer : This is an example of Kenitic and potential energy
Explanation:
kenitic: the act of moving or motion
potential: not. moving YET
he was not moving when he was on the plane and had potential energy cause he wasn't getting pulled down and kenitic energy was when he was getting pulled down from force of gravity when he was getting pulled to the ground when he was skydiving
How is energy connected? CORRECT ANSWER GETS BRAINILIEST!
a) Energy is connected through chemical bonds
b) Energy is not connected
c) energy is connected through light waves
d) Energy is connected as it constantly moves from one place to another
(Explanation is unnecessary, only answer! Thank you in advance!)
Answers
An airplane travels a distance of 4,000 km from New York to Los Angeles in 5 hours. Enter the numerical value for the average speed of the airplane.
Answers
Answer: Divide the km by the hours.
PLEASE HELP ASAP BEST ANSWER WILL BE MARKED BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The total mass of a pizza is 160 grams. When the pizza is cut into pieces, what parts equal the whole?
10 grams, 30 grams, 40 grams, 40 grams, and 30 grams
25 grams, 25 grams, 25 grams, 25 grams, and 25 grams
30 grams, 30 grams, 30 grams, 30 grams, 40 grams
50 grams, 30 grams, 30 grams, 30 grams, and 10 grams
Answers
Answer:
It is the 3 one
Explanation:
Please fill in the blanks. The words are: qualitative date, quantitative date, bar graph, circle graph, and line graph. Please no fake answers
Answers
Answer:
There are many types, including: Pie charts and bar graphs are used for qualitative data. Histograms (similar to bar graphs) are used for quantitative data
Explanation:
Dean Potter is known for slacklinging across a 615 meter deep ravine in Yosemite National Park with no safety gear. If his mass is 67 kg, how much potential energy did he have?
Answers
Explanation:
the gravitational potential energy applies.
the formula :
PE = m×g×h
mass × gravitational acceleration × height
in our case
PE = 67 kg × 9.81 m/s² × 615 m = 404,221.05 J
4.16 Lab: Motion and Forces
LOOK AT THE PHOTOS BELOW
Answers
An object's velocity is altered by a net force, and acceleration increases with net force. To accelerate to the same amount as being less massive objects, more massive objects need greater net forces.
What constitutes each of the four categories of forces?Any of the four fundamental forces—gravitational, electromagnetic, strong, & weak—that control how objects or particles interact as well as some particle decay—also known as the fundamental interaction is referred to as a fundamental force in physics. These basic forces serve as the foundation for all known natural forces.
Which are the main categories of force?Both contact forces & act at the a distance forces fall under the category of force. You employ force on a daily basis. Basically, force is push and pull. You exert force on an object when you push or pull it.
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Someone places a spoon in hot water. The spoon remains in the water till the water becomes room temperature, what temperature is the spoon handle?
Answers
Answer: Room temperature
Explanation: it makes sense (sorry if its wrong)
If the earth were less massive, what effect might that have on the gravitational attraction between the earth and the people on its surface? Support your answer with evidence from the text.
Answers
Answer:
if the earths mass were to spontaneously decrease, and the mass of its inhabitants were to stay the same, then the gravitational attraction between the 2 would be less.
Explanation:
cant provide evidence because you didn't include any text.
If the earth would have been less massive the gravitational attraction of the planet would change.
The strength of the gravitational force depended on the mass and distance. The gravitational attraction of the elements on the earth's surface would also be less and would tend to have no balance.The greater is mass the greater is gravity.
Learn more about the massive, what effect might that have on the.
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Tanya planted seedlings in her garden over the weekend. The instructions that came with the seedlings stated that they need to be planted 0.2 meters apart. Tanya has a measuring tape that has values in centimeters. Help Tanya convert meters to centimeters.
Determine the ratio to use: .
Tanya should plant the saplings 20 centimeters apart.
1 meter is equal to 100 centimeters.
Multiply the given value by the ratio: .
Answers
Answer:
Explanation:
1 meter = 100 cm
1 cm = 10 mm
Then,
0.2 m * 100 cm / 1 m = 20 cm
This does not seem like a physics question ??
How has the car affected the way people live? Give three ways
Answers
2. The automobiles (cars) gave people access to jobs, places to live, and services.
3. Being able to travel from one to place to another in just a matter of minutes.
2. companies, like Amazon can deliver packages by car.
3. You can easily listen to music or de stress while in the car.
that 3rd is bad but the other two are good. :)
What state of matter has the highest energy? options:
A. solid
B. gas
C. liquid
Answers
Answer:
B: Gas
Explanation:
Gas has greater particles of energy.
Gas is a state of matter that has the highest energy. The correct option is (B).
Generally speaking, gases have more energy than solids and liquids. The amount of energy the particles have and how tightly they are packed together determine the state of matter.
Solid: Particles have little energy and are tightly packed together in a solid form. They move in a predetermined pattern of vibration.
Particles have more energy in a liquid state than in a solid state. They can slide past one another more easily since they are not as densely packed.
Among the three states of matter, gases have the most energy. Particles travel quickly, have high kinetic energy, and are far apart in a gas state.
Hence, gas is a state of matter that has the highest energy. The correct option is (B).
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