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Does this element have high or low Electronegativity?
Does this element have high or low Atomic size
Does this element have high or low Reactivity
Chemical Symbols
100

Hydrogen 

Highest 

100

Helium

Least 

100

Fr 

Most 

200

Florine 

Highest 

200

Radium 

2nd largest 

200

H

Less

200

Be 

Beryllium 

300

Arsenic 

Neither. 
300

Rhodium 

Neither 

300

F

Most 

300

Ga

Gallium 

400

Astatine 

Lowest 

400

Neon 

2nd smallest 

400

At

Least

400

Sn

Tin 

500

Francium 

Least 

500

Francium 

Largest 

500

Cs

2nd most 

500

Hg

Mercury