justingajdosz justingajdosz

30-09-2016
Chemistry

Answered

An atom has a mass number of 24 and 13 neutrons. What is the atomic number of this atom? Express

Verified Answer :

Anonymous Anonymous

30-09-2016

A=mass number (protons + neutrons)
Z=atomic number (protons)
N=number of neutrons.

A=Z+N

Data:
A=24
N=13

Therefore:
24=Z+13
Z=24-13=11

Answer: The atomic number of this atom is 11. (The element is sodium)

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