Question

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Answer 1

5) Na, Z=11 1s2 2s22p6 3s1

H, Z=1 1s1

Be, Z=4 1s2 2s2

Mg, Z=12 1s2 2s22p6 3s2

C, Z=5 1s2 2s22p2

Mg>Na>Be>C>H

6) C<N<O<F

8)Cl2 -legatura covalenta; NaCl-leg. ionica; HCl-leg. covalenta; NaOH -leg. ionica

Na+ + OH- ---> Na+OH-

10) V=448l

P=1 atm

T=273°C

niu=?

P×V=niuRT => niu=P×V/RT =1×448/0.082×273= 20.01 moli CO2

2) 1s2 2s22p6 3s23p6 4s23d104p6 5s24d2

40e-

b) 1s2 2s22p6 3s23p6 4s23d104p6 5s24d105p1

49e-

1) 1s2 2s22p6 3s1

Strat- M(3)

Substrat ,,s" format dintr-un singur element

1e-

1s2 2s22p6 3s23p6 4s23d104p5

Strat- N(4)

Substrat p format din 3 orbital

17e-

3) F are 9e- in invelisul electric e=Z; Na are 11e-; Al are 13e-

F K(1)=2e- L(2)=7e-

Na K(1)=2e- L(2)=8e- M(3)=1e-

Al K(1)=2e- L(2)=8e- M(3)=2e-