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statuscvo [17]
3 years ago
13

How many neutrons make up one of these potassium atoms

Social Studies
2 answers:
Nonamiya [84]3 years ago
7 0
20 
Why: 39 (mass number of K) - 19 (atomic number or number of protons) = 20 (number of neutrons) 
allsm [11]3 years ago
7 0

Answer:

20 approximately.

Explanation:

There are two variables that you could use to calculated: Atomic Number and Atomic Mass.

Atomic number refers to the number of protons that the atom has.

Atomic mass refers to the whole: protons and neutrons.

If we subtract:  Atomic mass - Atomic Number = Number of protons.

For potassium (K):

Atomic number: 19

Atomic mass: 39.09. (we round the number for the subtract).

So, 39 - 19 = 20.

<u>20 PROTONS.</u> Approximately.

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