Please answer question number 2 and 3....
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2q) a 6
b SH6
c sulphur non metal
3) 18
1s2 2s2 2p6 3s2 3p6
group no. 18
period no. 3
valency 8
Explanation:
refere periodic table
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2.
(a) Electronic configuration of X is 2,8,6
Valence electrons = 6
Valency = 8-6 = 2
(b) Formula with hydrogen - H2X or H2S
Figure is given.
(c) Sulphur, Non metal.
3.
Atomic number of X = Mass of number X - No. of neutrons = 35 - 18 = 17
Therefore electronic configuration of X is 2,8,7
Group no. 17
Period no. 3
Valency = 8-7 = 1
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