Question

1. how are periods and groups different from each other? write it! question 2 answer here go to question 3

Explanation:

In the periodic table, periods are horizontal rows. Elements in the same period have the same number of electron shells. Groups are vertical columns. Elements in the same group have similar chemical properties because they have the same number of valence electrons.

Answer:

Periods are horizontal rows (same number of electron shells), groups are vertical columns (similar chemical properties due to same valence electrons).