valency is also the number of electrons donated accepted by an atom so as to achieve stable electronic configuration of the nearest noble gas with reference to this definition a] state what is meant by stable electronic configuration b] state why the valency of sodium magnesium and Aluminium is +1 +2 + 3 and why is chlorine oxygen nitrogen -1 -2 - 3 respectively.
Answers & Comments
Explanation:
A) stable electronic configuration is the setting of numbers in the valence shell namely K,L,M and N
for ex:2,8 and 2,8,2
or the chemicals containing digit 8 called octave and digit 2 called duplet in their last valence shell are stable chemical.
B) the valency of sodium magnesium and Aluminium is +1 +2 + 3 b'cause they can donate 1 electron from their valence shell to complete their octate or duplet to become stable and move freely or to do their random motion .
and chlorine ,oxygen ,nitrogen -1 -2 - 3 respectively b'cause they want electrons to become stable.
+ve sign; for donating
-ve. sign;for need
1,2,3 for gaining and sharing
4. for donating
5,6,7,8, for doing bonding
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