Symbol
Name
Riddle
Part of
Compound
100

(H)

hydrogen
100

Silicon

Si

100

My Symbol is the 9th letter of the alphabet 

I/Iodine

100

I am in Aluminum Foil

Aluminum

100

H2O

Hydrogen and Oxygen 

200

(K)

potassium

200

Sulfur

S

200

I am the first element with 2 letters in its symbol

Helium 

200

I am in Pennies 

Zinc/Copper

200

Na2S

Sodium and Sulfur

300

(Li)

lithium
300

Iron

Fe

300

I am the 3rd element in column 1

Sodium

300

Every Living thing is made of me

Carbon

300

MgSi2

Magnesium and Silicon

400

(Hg)

mercury

400

Sodium

Na

400

I am the the only symbol with a X in it

Xe Xenon 

400

I am very common in California 

Gold

400

BF3

Boron Florine

500

(Cu)

copper

500

Manganese 

Mn

500

I am the 5th element

Boron

500

I am used in cigars 

Phosphorus 

500

CaO

Calcium Oxygen