Question

learning valency in the easiest way for one to twenty​

Answer 1

Answer:

1 Answer. Stefan V. So, the first 20 elements in the periodic table start with H and end with Ca. The quickest way to remember the number of valence electrons is to form a relationship with the number of the group the element is located in.

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Answer 2

Answer:

Stefan V. So, the first 20 elements in the periodic table start with H and end with Ca. The quickest way to remember the number of valence electrons is to form a relationship with the number of the group the element is located in...