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Anna11 [10]
3 years ago
8

Help!!!

Chemistry
2 answers:
Paha777 [63]3 years ago
7 0

那是因为我很笨,我不知道,但无论如何

Explanation:

ok

Margarita [4]3 years ago
6 0

Answer:

The answer is: The mass number remains the same, and the atomic number decreases by one.

The rest of the assignment:

Polonium has a large, unstable nucleus. Through which process is it most likely to become stable?

gamma decay

beta-plus decay

beta-minus decay

alpha decay(✔️)

Which type of energy does alpha decay generate?

Potential

Sound

Electromagnetic

kinetic(✔️)

Use the equation to answer the question.

14 6C→14 7N+ 0−1e

Which type of radioactive decay does the equation model?

alpha decay

beta-minus decay(✔️)

beta-plus decay

gamma decay

How does the nucleus change in beta-plus decay?

The mass number decreases by one, and the atomic number remains the same.

The mass number remains the same, and the atomic number decreases by one(✔️)

The mass number remains the same, and the atomic number increases by one.

The mass number increases by one, and the atomic number remains the same.

An unstable nucleus undergoes gamma decay. How does the nucleus change?

It becomes less stable by repositioning its particles.

It becomes more stable by emitting energy and particles.

It becomes more stable by repositioning its particles(✔️)

It becomes less stable by emitting energy and particles.

Hope this helps

Explanation:

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6 0
4 years ago
What are the steps to finding an items density?
Assoli18 [71]
There are 5 steps:
1- measure the mass of the container
2- measure the volume of the liquid
3- measure the combined mass of the liquid and the container.
4-determine the mass of the liquid alone
5-divide the mass by the volume.
3 0
3 years ago
Rubidium has two naturally occurring isotopes, rubidium -85 ( atomic mass = 84.9118 amu; abundance = 72.15%) and rubidium -87 (a
son4ous [18]

Answer:

The answer to your question is: 85.458 amu

Explanation:

data

Rubidium-85   A = 84.9118 amu   abundance = 72.15%  

Rubidium - 87  A = 86.9092 amu abundance = 27.85%

Atomic weight = ?

Atomic weight = 84.9118(0.7215) + 86.9092(0.2785)

Atomic weight = 61.2538 + 24.2042

Atomic weight = 85.458 amu

6 0
4 years ago
What does atomic mass count?
belka [17]
Atomic mass is the sum of the masses of the protons, neutrons, and electrons in an atom
5 0
3 years ago
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