Question

What is the relationship between the period number and the number of valence electrons?

Answer 1

Answer: Across each row, or period, of the periodic table, the number of valence electrons in groups 1–2 and 13–18 increases by one from one element to the next. Within each column, or group, of the table, all the elements have the same number of valence electrons.

Answer 2

Relationship between the period number and the number of valence electrons:

• There are total 7 period in a periodic table.
• Valence electrons can be also determined as electrons in the outermost shell.
• The number of valence electrons in an atom is reflected by its position in the periodic table of the elements.
• Across each row, or period, of the periodic table, the number of valence electrons in groups 1-2 and 13-18 increases by one from one element to the next.
• For example: Group 17 has 7 valence electrons which is one less to the next group number i.e. 18.
• Within each column, or group, of the table, all the elements have the same number of valence electrons.

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