how to remember the valencies and periodic table of elements?

Answers (1)

These are the steps:-

1. write the atomic number.

2 write the electronic configuration.

3. check last subshells 

4 combo - a. [(n-1)d, ns]   b. [(n) s, np ]   c. [(n-1) d, ns, (n-2) f]   d. [(n) s,]

these will be valencies.

 

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