Atoms & Periodic Table Review

What family is Bromine in? (Br)

These have hardly any 'weight': 

He figured out how to organize every atom in perfect order and created the first PERIODIC TABLE

How many valance electrons does sodium (Na) have?

What is the atomic mass of this atom? 

How many neutrons does this element have? 

Calcium is in the ____________ family

How many neutrons does this element have? 

This experiment lead to the discovery of this part of the atom: 

The dots in the diagram below represent..... 

Which family does this element belong to? 

How many valance electrons does Yttrium (Y) have?

This was used to discover that atoms have a dense 'solid' nucleus.

The highlighted elements are.... 

Who discovered neutrons? 

Scandium is in the ___________ family.

This is a _____________. 

Who is credited with the discovery of electrons? 

How many electrons does this element have? 

Who did this famous experiment? 

This was used to discover the existence of electrons: 

What element is this?