Question

carbon has atomic number 6. it comprises thee isotopes, the first with 6 neutrons, the second with 7 neutron, the third with 8 neutron. calculate the mass

Answer 1

And valency of carbon is 3

Answer 2

Answer:

valency is atomic no =4

atomic no= no of protons =4

i) no of neutron =6

mass no = no of proton + no of neutron

= 3+6= 9

ii) mass no = 3+7= 10

iii) mass no= 3+8 = 11