Kamis, 19 Maret 2015
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Soal kimia
1. We have = 1s2 2s2
2p6 3s2 3p4 , determine :
(diketahui=
1s2 2s2 2p6 3s2 3p4,tentukan :
a. nomor atom unsur netralnya
(the number atom
of netral element)
b. terletak pada golongan
(the position on
group)
c. terletak pada periode.
(the position on
period)
2. Bilangan kuantum 20Ca adalah...
(the quantum number of 20Ca is)
3. Tentukan Bentuk molekul SO2,
berdasarkan teory VSEPR
(determine the types of molecules of the
compound SO2,based on VSEPR theory !
4. Tentukan bentuk molekul CCl4 ,berdasarkan
teori hibridisasi.
5. Apakah rumus molekul yang termasuk ke dalam
ikatan van der waals (What are the compounds included in the van der waals
bond?)
Solution
:
1. a. 1s2 2s2 2p6
3s2 3p4 = 16
b. 3s2
3p4 = 2 + 4 =
group 6
c. 3s2
3p4 = period 3
2. 20Ca (Ar18) 4s2
4s2 n = 4 , l = 0 , m = 0 , s =
- 
3. SO2
S = group VI A Valence electrons 6
O = group VI A Valence electrons 6
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PEI (X)
= 2
PEB (E) = 1
PET = 3
AX2E
( Trigonal bentuk
V )
4. CCl4
C =1s2
2s2 2p2
4Cl- = (Ne10)
3s2 3p5
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____
___ ___ ___
2s2
2p2
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___ ___ ___ ___
4Cl-
5. The solution are :
HCl,HBr,HI
