Question

The atomic masses of 6/3Li and 7/3Li are 6.0151 amu and _______.

a) 7.0151 amu
b) 6.999 amu
c) 6.015 amu
d) 7.015 amu

Answer 1

The atomic mass of lithium-7 is 7.015 amu.

Step-by-step explanation:

The atomic masses of 6/3Li and 7/3Li are 6.0151 amu and 7.015 amu respectively.

Lithium-7 (7/3Li) contains three protons and four neutrons, giving it a mass number of 7 and an atomic mass of 7.015 u. Lithium-6 (6/3Li) contains three protons and three neutrons, resulting in a mass number of 6 and an atomic mass of 6.0151 u.

Therefore, the correct answer is option d) 7.015 amu.