Question

What do you notice about the number of valence electrons as you move from
left to right across a period in the periodic table?​

Answer 1

Answer:

answer is...

Explanation:

The number of valence electrons decreases from left to right across each period. The number of valence electrons increases from top to bottom within each group. All of the elements in group 9 have nine valence electrons. Elements with the most valence electrons are in group 18.

Answer 2

• An atom has valance electrons. valency is the number of electrons in the outermost shell.

• As we know that the number of valence electrons will be decreased.

• When they move from left to right across a period in the periodic table.

• As we observe the number of valence electrons will be increased.

• When they move from top to bottom within each group.

• The elements in group nine have nine valence electrons.