Question

question 1 (mandatory) (1 point)
a $_{17}^{35}$cl atom has _______ protons, _____ neutrons, and _______ electrons.
a) 17; 18; 17
b) 17; 35; 17
c) 18; 35; 17
d) 35; 17; 17
e) 18; 17; 18

Explanation:

Step1: Identify proton number

The sub - script in the isotope notation $_{17}^{35}\text{Cl}$ represents the atomic number (Z), which is the number of protons. So, the number of protons is 17.

Step2: Calculate neutron number

The mass number (A) is the sum of protons and neutrons. Given A = 35 and Z = 17, the number of neutrons $n=A - Z=35 - 17 = 18$.

Step3: Determine electron number

In a neutral atom, the number of electrons is equal to the number of protons. Since it is a neutral chlorine atom and the number of protons is 17, the number of electrons is 17.

Answer:

A. 17; 18; 17