The Periodic Table Review

I am shiny, malleable, a good conductor of electricity and form positive ions.  I am 

I am in group 3 and period 5.  Who am I?

I am the only metal that touches the stair step.  

I am the noble gas in Period 5.

Atoms of the same element that have different numbers of neutrons are 

The periods on the Periodic Table are 

Where are the Noble Gases located?

I am a metalloid and a halogen. Who am I?

Atoms that have lost or gained electrons are

Cobalt is a 

Groups on the Periodic Table are

Halogens are in group 

Which represents the alkaline earth metals?

Groups/families are represented by

I have the same atomic number as the mass of oxygen.

I am a metalloid that has an important role in the electronics because I am a semiconductor.

I am in group 7 period 3.  Who am I?

The element in group 4, period 2.

Metals are _______ the staircase line on the periodic table.

The stair step on the Periodic Table

The element in the second group, 6th period.

Noble gases are in group 

I am a shiny liquid.  Who am I?

I am dull, brittle when a solid, and a poor conductor of electricity,   I am a 

The 3rd period noble gas.