Question

Charge of the species with 17 protons, 18 nuetrons and 18 electrons is

A) + 1 B) – 1 C) – 2 D) None​

Answer 1

B) – 1

one extra electron

Charge will be negative

because the number of electrons are more

Answer 2

Charge due to neutrons : Zero

Charge due to protons : 17 × (+e) = 17e

Charge due to electrons : 18 × (-e) = -18e

Net charge on species = 17e + (-18e) + 0 = -1e = -1.602 × 10^ (-19)