Question

solve this q 6 please !
can anyone help me in this

Answer 1

atomic number 4 as no. of proton =atomic no.and mass no.is 9 as mass no.=no.of proton +no. of neutron electronic configuration (2,2)

2) atomic no.20 as it is equal to no. of electrons no.of proton is 20 and no.of neutron is also 20. electronic configuration (2,8,8,2)

3)no.of proton is 13 and electron is also 13 and its mass no.is 14+13=27. electronic configuration (2,8,3)

4)atomic no.is 15 and mass no.is 15+17=32
and no.of electron is 15. electronic configuration (2,8,5)