1.a.
K=2
L=8
M=8
Z=K+L+M=2+8+8=18
b.
K=2
L=8
M=18
N=3
Z=K+L+M+N=2+8+18+3=31
c.
K=2
L=1
Z=K+L=2+1=3
2.
Mg
A=24
1 mol Mg.........NA atomi Mg
x moli Mg...........1 atom Mg
[tex]x = \frac{1 \times 1}{6.022 \times {10}^{23} } = 0.16 \times {10}^{ - 23} [/tex]
C
A=12
1 mol C........NA atomi C
x moli C...........1 atom C
[tex]x = 0.16 \times {10}^{ - 23} [/tex]
Ca
A=40
1 mol Ca.........NA atomi Ca
x moli Ca...........1 atom Ca
[tex]x = 0.16 \times {10}^{ - 23} [/tex]
H
A=1
1 mol H.........NA atomi H
x moli H...........1 atom H
[tex]x = 0.16 \times {10}^{ - 23} [/tex]
Na
A=23
1 mol Na.........NA atomi Na
x moli Na...........1 atom Na
[tex]x = 0.16 \times {10}^{ - 23} [/tex]