Atom Counting and Identification

Which of the following is an element?

• Water

• Oxygen

• Carbon dioxide

• Salt

• 1

• 2

• 3

• 4

Which of the following is a compound?

• Helium

• Nitrogen

• Sodium chloride

• Gold

• 1

• 2

• 3

• 4

• Carbon and Oxygen

• Carbon and Hydrogen

• Hydrogen and Oxygen

• Carbon and Nitrogen

• 2

• 3

• 4

• 5

Which of the following statements is true about elements and compounds?

• Elements are made of compounds.

• Compounds are made of elements.

• Elements and compounds are the same.

• Compounds cannot be broken down into elements.

• 2

• 3

• 4

• 5

• It contains only one type of atom.

• It is made up of two different elements.

• It cannot be broken down into simpler substances.

• It is a pure substance.

• 5

• 6

• 7

• 8