Question

periodic table high school reference sheet
how many electrons does one neutrally charged atom of argon have?
a. 18
b. 22
c. 40
d. 58

Explanation:

Step1: Recall atomic number property

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

Step2: Find argon's atomic number

Argon's atomic number is 18 from periodic - table. So, number of electrons in neutral argon atom is 18.

Answer:

A. 18