Question

chemistry semester 1 exam on level 25-26
silicon-30 contains 14 protons. how many electrons does si-30 have?
14
0
44
30

Explanation:

Step1: Recall atom structure rule

In a neutral atom, number of electrons = number of protons.

Step2: Apply to Si-30

Si-30 has 14 protons. So electrons = 14.

Answer:

A. 14