Periodic Table

Question 1

What are the horizontal rows called

Answer 1

periods

Question 2

What are the vertical columns called

Answer 2

Groups

Question 3

What trends occur

Answer 3

1. The elements in the same period have the same number of shells
   2.In the same group have same number of electrons on outer shell

Question 4

How many groups are there in the periodic table

Answer 4

8

Question 5

What decreases going down the periodic table

Answer 5

Density
Melting and boiling points