Covalent: name to formula
Atomic Number Numbers
Rhyme Time
IONIC Name to Formula
Covalent or ionic
100

CO2

carbon dioxide

100

19 protons

What is Potassium?

100

Dead

What is Lead?

100

NaCl

sodium chloride

100

CO

Covalent

200

N2O

dinitrogen monoxide

200
6 protons + 6 neutrons

What is carbon?

200

Bin

What is Tin?

200

Li2O

lithium oxide

200

magnesium chloride

Ionic 
300
Cl5F6

pentachlorine hexafluorine 

300

10 electrons in a neutral atom

What is Neon?

300

Mould

What is gold?

300

CaCO3

What is calcium carbonate?

300

Carbon tetrachloride

Covalent

400

PSe7

phosphorous heptaselenide

400

81 protons, 81 electrons

What is Thallium?

400

Eon

What is Neon?

400

Fe2O3

What is iron (III) oxide?



400
water

covalent 

500

H2O

dihydrogen monoxide

500

one less proton than aluminum

What is Magnesium?

500

Hopper

What is copper?


500

Cu(PO4)2

What is Copper (II) phosphate?

500

silver (ii) nitrate 

What is ionic?