Elements and compounds

Is water element, or compound?

• Compound

• Element

Which is NOT a compound?

• CO₂

• H₂O

• S

• SiO₂

How many elements are represented in the compound?

Na₂CO₃

• 1

• 2

• 3

• 6

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• element

• compound

Which of the following does NOT belong to the group?

• Baking soda

• Hydrogen

• Neon

• Tin

Which of the following statements is true about the illustrations below?

• Illustrations I and IV are elements; Illustrations II and III are compounds.

• Illustrations II and III are elements; Illustrations II and IV are compounds.

• Illustrations I and II are elements; Illustrations III and IV are compounds.

• Illustrations III and IV are elements; Illustrations I and II are compounds.

How many elements are in H₂O

• 1

• 2

• 3

• 4

Is salt (NaCI) a compound or a element

• Element

• Compound

When one or more substance is combined it is called __________________.

• compound

• element

• mixture

• solution

Which of the following statements describes an element?

• It contains only one kind of atom.

• It can be decomposed by ordinary chemical means.

• It is composed of atoms of two or more elements that bond together.

• It has unique properties that are different from the properties of its individual elements.