Can you please tell me a easier way to byheart the valency of 1 to 20 elements .
Asked by Sushma
12th September 2017,
6:40 PM
Answered by Expert
Answer:
Dear sushma.ananth@gmail.com,
There is no need to byheart the valency of 1 to 20 elements.
1) Find out the atomic number.
2) Find out the position of that element in the periodic table, that means group and period.
3) Knowing the group number is more important as it directly give you valency.
4) Understand the trend of valency in the periodic table.
For example, in period 2, it goes on increasing from lithium to carbon as 1 to 4 and then decreases from nitrogen to neon as 3 to 0.
Remember that valency does not have positive or negative sign. Oxidation states are positive or negative.
Answered by Expert
13th September 2017,
2:23 PM
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