Transformati atomi in ioni specificati electrovalenta 2Da ,5B, 19K ? VA ROGGG AJUTATI-MA DAU COROANA !!!!!!!!!!

Răspuns :

2 He - este un gaz rar. nu prezinta ioni

B, Z= 5 ; 1s2/2s2 2p1 -3e => 1s2/ (B(+3))

K, Z=19 ; 1s2/ 2s2 2p6/ 3s2 3p6/4s1 -1e => 1s2/ 2s2 2p6/ 3s2 3p6/ (K(+1))