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16-12-2019
Chemistry

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20. An atom has a mass of 50 and 20 protons. How many
neutrons does it have?
Answer:

Respuesta :

16-12-2019

Answer:

30

Explanation:

The mass number (A) is the sum of the numbers of protons and neutrons .

A = p + n

If p = 20,

n = A - p = 50 - 20 = 30

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