Chemistry Middle School

Which of the following observations indicates that atoms of all elements contain small, negatively charged particles?

A) Alpha particles are repelled by cathode rays of elements

B) Cathode rays are deflected towards a positively charged rod

C) a particulat frequency of light is produced by a gas in an excited state

D) certain areas of the atom called orbitals contain all the charged particles

Answers

Answer 1

Answer:

B) Cathode rays are deflected towards a positively charged rod.

Answer 2

Answer: The correct option is  b (Cathode rays are deflected towards a positively charged rod )

Related Questions

Why do you think the older scientist disregarded the younger scientist's prediction?

Answers

Answer:

pls explain, can you show what the younger scientist did.

Explanation:

Do you think the younger scientist had enough evidence for his prediction?

Answers

Answer:

yes

Explanation:

You have no context to the problem

5 SENTENCES DESCRIBE THE STEP BY STEP PROCESSES OF HOW THE IMMUNE SYSTEM PROTECTS US. Pls and thank u

Watch this video to help u with the question https://kidshealth.org/en/kids/ismovie.html?WT.ac=k-ra

Answers

Answer:

The immune system

Explanation:

The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins. As long as your immune system is running smoothly, you don't notice that it's there.

The immune system protects us from harmful diseases/sicknesses.

When does the first step of digestion usually occur?

Multiple choice question.

A)
when the organism discovers the food


B)
when the food is chewed


C)
when the food is swallowed


D)
when the nutrients are absorbed

Answers

Answer:

B

Explanation:

Firstly, when the food is chewed then the saliva is secreted and mixed with food. Then the food is swallowed and nutrients are absorbed.

Provide 3 examples of substances that are mixtures and list the substances in them.

Answers

Salt and water
Sugar and salt
Salt and pepper
Bleach Sulfrate Meth and pure vinegar Salt Sodium Cloride

If two trucks are moving at the same speed, but truck A has a mass of 3,000 kg, and truck B has a mass of 4,500 kg, what statement is true?


Truck B has less kinetic energy.


Truck A has greater kinetic energy.


Truck B will have a greater stopping distance.


Truck A will have a greater stopping distance.

Answers

Answer:

Truck B will have a greater stopping distance.

Explanation:

I did it before

Truck B is true because it just is and answer it

PLZ help and fast

Compare your responses when you were warned and when you were not warned.

Decide if any of your reactions were reflex responses, and explain your answer.

Infer why organisms have reflex responses to some stimuli.

Answers

Answer:

Explanation:

It can possibly be because of genetics in me. For instance: I love dark chocolate, and every time I eat some, it can activate the same photic sneeze reflex as the sun.

ILL GIVE U 100 POINTS!!!!
Using the letters from Betelgeuse and Aldebaran, see how many different words of four letters or more you can make in ten minutes. Each word you make counts as 5 points. Record your words in the Report document.

Answers

Answer:

I

Explanation:

Anything under 157, remember it’s how many you do, also sorry for being a bit late

What are the strengths and limitations of your model?

Answers

Answer:

Missing Details. Most models can't incorporate all the details of complex natural phenomenaExplanation:

how do you word an informative essay in science class about newton's laws of motion seventh grade

Answers

Try looking at informative essays to help with the base then brain storm what your topic is about! this is the method that helps me the most! i will elaborate if needed! :)

If my skater begins at a height of ______ meters, then the skater will have enough total energy to successfully complete the skate park ramp from start to finish. (Fill in the blank with a height between 0 and 10 meters.)
JUST PLS FILL IN THE BLANK

Answers

Answer: 5

Explanation:

If my skater begins at a height of 5 meters, then the skater will have enough total energy to successfully complete the skate park ramp from start to finish

Brainliest me

If my skater begins at a height of 5 meters, then the skater will have enough total potential energy to successfully complete the skate park ramp from start to finish.

If my skater starts at a height of 5 metres, he or she will have enough total potential energy to complete the skate park ramp from beginning to end. Potential energy is a physics notion that is affected by an object's height and mass. Because of its position in a gravitational field, an object at a specific height above the earth has potential energy.

The skater has a particular amount of potential energy connected with their starting height of 5 metres. As they go down the ramp, this potential energy is turned into kinetic energy, or motion energy. As the skater moves down the ramp, their speed rises, as does their kinetic energy.

To know more about potential energy, here:

https://brainly.com/question/24284560

#SPJ3

GIVING BRAINLIEST!
1. Tom and Tina decided they wanted to start a family. Tom knew his grandfather had sickle-cell disease. Sickle-cell disease is a recessive disorder that causes blood cells to stiffen and take on a crescent shape. These blood cells have a difficult time moving through the blood vessels and can cause health problems. Tina didn’t know of any family members that had it. Still, before they got pregnant they both went to the doctor for genetic tests. The doctor found that even though Tom and Tina were healthy, they both carried the gene for sickle-cell disease. Make a Punnett Square to determine the probability of Tom and Tina’s child having sickle-cell disease.

Use the space below to tell the probability of Tom and Tina having a child with sickle-cell and explain how you determine that.

Answers

it depends if their parents carry the gene, but from what we know, it is a 50% chance that the baby will have the disease.

PLZZ help.
p.s it's fro science the big bang theory
I DON"T KNOOOWWW

Answers

Answer:

i think its subatomic particles

Explanation:

The answer is A

Subatomic particles are what make up atoms so they therefore must come first. C and D are both made of atoms so the correct answer is A.

Why do you think the older scientist disregarded the younger scientist's prediction?

Answers

The older scientist disregarded the younger scientist prediction because the older scientist thinks that he has more experience than the younger scientist, therefor he should disregard the younger scientist prediction.


This is not true at all the younger and oldest scientist are equally as important. Just giving an example of what the older scientist might have thought.

PLEASE HELP If the melting point of copper is 1,085 °C, then the __________ point is __________ °C.

Answers

Answer: freezing point is 1,085

Explanation:

freezing point is 1,085

How would you classify this atom of oxygen?

Answers

Answer:

Oxygen is a chemical element – a substance that contains only one type of atom. Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. Oxygen is a gas at room temperature and has no colour, smell or taste. Oxygen is found naturally as a molecule.

Ion Anion an ion is a negatively or positively charged atom or radical
It’s atomic number is 8 which means it’s electronic configuration is 2,6 but it has 8 electrons in the l shell which means it is a negatively charged ion since the number of electrons is more than the number of protons. Anion is a negatively charged ion,cation is a positively charged ion

Renaldo says that concrete is useful because it is a low-maintenance material. Cynthia says that using concrete can be bad because it creates heat islands. Who is right?

-Only Cynthia is right.
-Neither is right.
-Both are right.
-Only Renaldo is right.
HELP PLEASE

Answers

both are right because they both state true facts about concrete

What is the Uncontrolled variables/limitations for this science expirement? Does the shape of an ice cube affect how quickly it grows? Need help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAPNeed help ASAP

Answers

For my Independent variable, I put "I would be changing what I put on the ice: sand, sugar, and salt. I don't know what to put for the dependent. I read the definition. For my controls, I put "the amount of sand, sugar, and salt being put on the ice cubes.
I hope this helps!
i dont think that’s how it works

How could you break down the compound calcium carbonate into the elements that make it up ? A. by melting B. by crushing C. with filter D. with chemical changes

Answers

Answer:

A: By melting

Explanation:

When calcium carbonate is heated it decomposes into calcium oxide and carbon dioxide.

A. By melting

You can break it down by thermal decomposition
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