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

Question

asked Sep 3, 2021 77.1k views

1 Answer

PMorganCA · Answer 1 · 2021-09-09T22:26:14+0000

Answer:

4

Step-by-step 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.