la567
contestada

4 points
Looking at the periodic table which way do we label the groups, which
way do we label the periods?

4 points Looking at the periodic table which way do we label the groups which way do we label the periods class=

Respuesta :

beryllium

The vertical columns are groups

The horizontal rows are periods

munah98

Explanation:

groups are the vertical rows of element and each group have the same no of valence electron

periods are the horizontal row of element on the basis of no of orbital