Elements and Compounds

Element or compound?

100

Gold, or Au

Element

200

Fe or Iron

Element

300

H₂O 

Compound

400

CH₄

Compound

500

K, or Potassium

Element

How many atoms?

100

How many atoms are in H₂O?

3

200

How many atoms are in Four molecules of Methane 

CH₄

20

300

How many elements are in Al₂(SO₄)?

3

400

One molecule of vinegar is represented by the formula C₂H₄O₂. If there were six molecules of vinegar, how many carbon atoms, would you have?

12

500

C₂H₄O₂ is the chemical formula for vinegar, how many hydrogen atoms are there?

4

chemical formula

100

2 atoms of hydrogen, 1 atom of oxygen

H2O

200

1 atom of carbon, 4 atoms of hydrogen

CH4

300

1 atom of sodium, 1 atom of chlorine

NaCl

400

1 atom of carbon, 2 atoms of oxygen

CO2

500

1 atom of nitrogen, 3 atoms of hydrogen

NH3

How many Elements

100

H₂0

2

200

CH₄

2

300

C₂H₂O4

3

400

C₁₂H₂₂O₁₁

3

500

NaHCO₃

4

Which Chemical Formula has more atoms?

100

NaHCO₃ or CO₂

NaHCO₃

200

K or CO₂

CO₂

300

CaCO₃ or 2CaCO₃

2CaCO₃

400

3H₂O or 6H +3O

Neither

500

6CH₄ or CH₇

6CH₄