Question

Consider the element sodium. it's atomic number is __________ and equals ___________.
a.11; the number of protons
b.12; the number of neutrons
c.23; the sum of protons and neutrons
d.23; the number of electrons

Answer 1

the answer to that is a.

Answer 2

Answer: The correct answer is Option a.

Explanation:

Atomic number is defined as the number of protons or number of electrons that are present in neutral atom.  It is represented as Z.

Z = Atomic number = Number of protons = Number of electrons

Sodium is the 11th element of the periodic table. The atomic number of this element is 11.

So, in a neutral element of sodium, the number of protons and electrons are 11.

Hence, the correct answer is Option a.