An atom fo an elecment has `13` electrons . Its nucleus has ` 14` neutrons . Find out atomic no. and approximate atomic weight . Indicate the the element .

Explanation

No. of ` e = 13`
` :. `No. fo protons ` =13`
` :. ` No. of neutrons ` = 14`
Atomic no = No. of proton `= 13`
App. At wt = Of neurron
` = 13 = 14 = 27`
Electronic configuration :
` 1s^2 , 2s^2 2p^6 , 3s^2 3p^1`
Electrivelency ` = + 3`
i.e , no of electrons in outemost shell .