Question

Lithium has 3 protons. how many neutrons are in the isotope lithium-8?

Answer 1

5 neutrons in lithium-8

Answer 2

Answer:

Number of neutrons=5

Step-by-step explanation:

We are given that

Number of protons in lithium=Z=3

Mass number of lithium=A=8

We have to find the neutrons in the isotope lithium-8.

We know that

Number of neutrons=A-Z

Where A= Mass number

Z= Number of protons=Atomic number

Substitute the values then we get

Number of neutrons=8-3=5

Answer : 5