Periodic Table

The periodic table gets more reactive from left to right.

Metals are good conductors of electricity and heat. 

Elements in group 2 are more reactive than those in group 17 because of their valence electrons.

How many protons are in an atom of Silicon?

Elements at the bottom were pulled out to keep the table from being too long; the first row

Group 17 is also called

Second group of the periodic table.

How many periods does the Periodic Table have?

Elements 1 - 93

Halogens are elements with properties that fall between those of metals and nonmetals. 

Group 18 is unreactive and called the 

This element is a gas.

The periodic table is arranged in ABC order. 

The black zigzag line separates what?

Most elements are___.

First group in the periodic table

Oxygen is in period 2, group 16.

How many neutrons are in Aluminum?

Elements of the same group have similar properties because they have the same number of protons

Elements in groups 3 - 12 are called

How many groups are in the periodic table?

Elements that touch or border the zigzag line are classified as ___.

I am in period 5, group 18. Who am I?

Indicates the number of valence electrons that an atom has. 

Which element is in period period 5, group 11?