GeorgeR GeorgeR

22-12-2020
Chemistry

contestada

An atom has a mass number of 9 and 5 neutrons. What is its atomic number?
OA. 14
O B. 11
OC. 4
OD. 19

Respuesta :

jcherry99 jcherry99

22-12-2020

Answer:

4

Explanation:

It should be 4

The mass is 9

There are 5 neutrons

There are 9 - 5 = 4 protons

So it is the 4th element on the periodic table.

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