Prisijunkite
WAEC - Chemistry (2002 - No. 18)
An element Y has the electronic configuration 1s
2
2s
2
2p
6
6
2
3p
4
. To what period does it belong in the periodic table?
3
4
5
6
Komentarai (0)
Prisijungti Norėdami komentuoti
Skelbimas
Leiskite javascript tinkamai įkelti šį puslapį
