SycoGirl: AP ko kese pta h k p block h or 5th group h is element ka49 months ago
Professor_Sam_Soomro: 5th group hai na. Sorry 13 hai isla atomic number 1s2Ψ 2s2Ψ 2p6Ψ 3s2Ψ3p1 hoga ab Pblock hai49 months ago
SycoGirl: Ab ye btaen k aluminum knse GRP or knse period m h49 months ago
Professor_Sam_Soomro: Aluminium atoms 11 ok. 1s2Ψ 2s2Ψ 2p6Ψ3s1 ab 1s2 hogya K shell 2s2Ψ2p6 total 8 L shell 3s1 electron 1 extra hai wo b S block me means +1 valency hue49 months ago