, :

.

17

1

2

13

14

15

16

17

18

1 H3 Li 4 Be 5 B 6 C 7 8 9 F 17 Cl 35 Br 53 I

2 He10 Ne

85 At

(F), (Cl), (Br), (I) (At). , , . , , .

(g/mL) 20 C

F

9

-188,14

0,0017

F2 Cl2 Br2 I2

Cl

17

-34,60

0,0032

Br

35

58,76

3,1900

I

53

184,35

4,9200

14 : To , . : CFCs , ,

15 :

CFCs , , ,

16: :

17: : ,

. . NaCl

. KBr

. KI

H2O

18: gNO3 H2O gNO3(s) g+(aq) + NO3-(aq) NaCl H2O NaCl(s) Na+(aq) + Cl-(aq) g+(aq) + Cl-(aq)H2O

Ag

+

Na+-

NO3

Cl-

gCl(s)NO3Na+