Question

An atom has atomic number 5 and mass number 11. How many neutrons does the atom have?
A- 5
B- 6
C- 10
D- 11

Answer 1

Answer:

B

Explanation:

neutrons + atomic number/proton/electron for a neutral atom = mass number

e.g

mass number of Chlorine 35.5

proton number 17

neutron number will be 35.5-17 = 18.5

Therefore.....

your question deduced says

atomic number is 5

mass number is 11

neutron number is however mass number minus atomic number 11-5 =6