Rapuns a) si b)
(13)Al: 1s2-2s2-2p6-3s2-3p1
orbitali = 7
straturi = 3
substraturi = 5
(24) Cr 1s2 2s2 2p6 3s2 3p6 3d6 4s1 3d5(↑↑↑↑↑)
orbitali = 15
straturi = 4
substraturi = 7
c) 27 g Al......................................6,023*10 la 23 atomi Al
5,4 g................................................x
x = 1,2046*10 la 23 atomi Al
1 atom Al..........................................................7 electroni ''p''
1,2046*10 la 23 atomi Al............................... y
y = 7 * 1,2046*10 la 23 electroni ''p''
