Question

6 si 7.Va roggg repedeeeee
Dau coroana!!!!!Urgent va rog imi trebuie neaparat până maine!!​

Answer 1

VI.

consideram ca X = x e-, Y = y e- si T = t e-

Daca sunt consecutive atunci

y =x+1, t=x+2

=> x +x+1+x+2 =21

=>x=6, y= 7 si t = 8

X: 1s2 2s2 2p2

Y: 1s2 2s2 2p3

T: 1s2 2s2 2p4

VII.

V.cub = L.la3 = 1la3 = 1 cm3

ro = m/V

=> m.Fe = ro×V

= 7,8×1 = 7,8 g Fe

1 mol Fe ......56 g Fe .....6,022×10la23 atomi Fe

7,8g Fe ..... n = 8,38×10la22 atomi Fe