revision

Elements on the Period Table are classified into categories such as

• Rocks and minerals

• Metals and Non-Metals

• Mixtures and Compounds

• Molecules and Atoms

Salt dissolved in water is classified as...

• Element

• Compound

• Mixture

15. Hydrogen chemically combined with oxygen is classified as...

• Compound

• Element

• Mixture

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 8

What is the atomic mass of "F"

• 9

• 18

• 17

• 19

Different isotopes have...

• different masses

• different electrons

• different protons

The atomic weight represents the weighted average of the

• atom's electrons number

• atom's mass

• atom's protons number

A _________ is made up

of tiny particles called atoms

• soil

• matter

• weight

• mass

Which of the following is defined as, "a group of atoms joined together in a particular way"?

• molecule

• product

• atom

• reactant

Which term is defined as, "the temperature at which a substance changes from the liquid phase to the gas phase"?

• melting point

• boiling point

• model

• scale