Question

The number of electrons, protons and neutrons in ${}_{69}^{169}Tm$ respectively are:

• A. 69, 100, 69
• B. 69, 69, 100
• C. 100, 69, 69
• D. 69, 100, 100

Answer 1

The correct option is B 69, 69, 100

In ${}_{69}^{169}Tm,$ number of protons = 69

Number of neutrons = 169 – 69 = 100

Number of electrons = 69