CHEMISTRY HIGH SCHOOL

Which statement is true about a proton and an electron?(1) They have the same masses and the same charges.
(2) They have the same masses and different charges.
(3) They have different masses and the same charges.
(4) They have different masses and different charges.

Answers

Answer 1
Answer:

Final answer:

Protons and electrons differ in both their masses and their charges. Protons have a larger mass and positive charge whereas electrons have a smaller mass and negative charge.

Explanation:

The correct answer to your question about proton and electron characteristics is option 4: They have different masses and different charges. To elaborate, a proton is a positive-charged particle found in an atom's nucleus with a relatively high mass. On the other hand, an electron is a negative-charged particle circling the nucleus, with a mass nearly 2000 times lighter than a proton. Thus, they both differ in their masses and in their charges.

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Answer 2
Answer:

Final answer:

The statement that is true about a proton and an electron is that they have different masses and different charges, which corresponds to option (4).

Explanation:

The correct statement about a proton and an electron is that they have different masses and different charges. Therefore, the answer to your question is (4) They have different masses and different charges.

Protons are subatomic particles found in the nucleus of an atom and have a positive electric charge. On the other hand, electrons are subatomic particles that orbit the nucleus of an atom and have a negative electric charge. The mass of a proton is significantly larger than the mass of an electron.

A proton's mass is about 1.6726 x 10-27 kilograms, which is nearly 1836 times the mass of an electron, which is approximately 9.109 x 10-31 kilograms.

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If there is no net force on an object, then the object will a) continue to accelerate
B) begin moving slow down
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d) have to be at rest

Answers

If there is no net force on an object, then the object will maintain it's rate of speed. Basically, net force is the change in an object's motion. If it is stationary and not moving, the object will stay stationary. If the object is moving at a rate of 2 miles per hour, it will constantly continue to move 2 mph because there is no net force.

If you want to make 0.5 L of a 0.01 M solution of bromine (Br2) in water, how much bromine would you need? A. 0.8 grams. . B. 0.8 moles. . C. 1.6 grams. . D. 1.6 moles.

Answers

The answer is A. 0.8 grams.

The atomic mass of bromine is: A(Br) = 80
The molecule Br₂ consists of 2 Br atoms. Thus, the molecular mass of bromine is: Mr(Br₂) = 2*A(Br) = 2*80 = 160
This means there are 160 grams/l of Br₂ in 1 M.

Let's write a proportion. If 160 grams/l of Br₂ are present in 1 M, how much of Br₂ will be in 0.01 M:
160 g/l : 1 M = x : 0.01 M
After crossing the products:
x = 80 * 0.01 = 1.6 g/l

Let's write another proportion. If there are 1.6 g of Br₂ in 1 liter, how many of Br₂ will be present in 0.5 liter:
1.6 g : 1 l = x : 0.5
After crossing the products:
x = 1.6 * 0.5 = 0.8 g

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c. He
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Answers

This has all of the charges above the columns. Hopefully it helps!

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Answers

Answer:

Marie Curie, née Maria Salomea Skłodowska, (born November 7, 1867, Warsaw, Congress Kingdom of Poland, Russian Empire—died July 4, 1934, near Sallanches, France), Polish-born French physicist, famous for her work on radioactivity and twice a winner of the Nobel Prize.

Explanation:

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Answer:

Marie Curie is the one who earned the nobel prize twice for her work with radioactivity

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Answers

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Answers

Radioactivity another name for radioactive decay. Radioactivity refers to particles emitted from nuclei as a result of nuclear instability. 
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