Question Detail

CHM 101 CHM 101 Past Questions Objective Question

Question

How many neutrons are present in the nuclide Na? (Not fully written, assumes ²³Na)
Options
A 11
B 12
Correct Answer
C 23
D 10
Correct Answer

Option B is the correct answer.

Detailed Explanation

Sodium-23 (²³Na) has atomic number 11 (protons). Neutrons = mass number - atomic number = 23 - 11 = 12.

Hint

Neutrons = mass number - atomic number.

Question Info