Question

An atom has atomic number 5 and mass number 11. How many neutrons does the atom have?

5
6
10
11

Answer 1

6

Step-by-step explanation:

because amtomic weight is the sum of elctrons and neutrons and according to the question the mass is 11 so 5 +6 is eqal to 11

Answer 2

6

Step-by-step explanation:

mass number consists of the mass of protons and neutrons, hence we only need to subtract atomic number(also known as the proton number) from the mass number

therefore, no. of neutrons=11-5=6