Question

Write the no. of electron proton and neutron and electron configuration of sodium atom and sodium cation

Answer 1

electron  11
proton     11
neutron    12

Answer 2

In Sodium, ( Z = 11, A = 23 )
no. of proton = 11
no. of electron = 11
no. of neutron = 12

Electronic configuration of sodium atom,
${1s}^{2} {2s}^{2} {2p}^{6} {3s}^{1}$
Electronic configuration of sodium cation (Na+)
${1s}^{2} {2s}^{2} {2p}^{6}$