Question

An atom of an element contains 11 electrons. Its nucleus has 13 neutrons. Find out the atomic number and approximate atomic weight.

• A. 11, 25
• B. 12, 34
• C. 10, 25
• D. 11, 24

Answer 1

Answer: (D)

11, 24

Answer 2

Number of electrons =11

$\therefore$ Number of protons = Number of electron =11

Number of neutrons = 13

Atomic number of element = Number of proton = Number of electrons =11

Further, Atomic weight = Number of protons + Number of neutrons =11 + 13=24