Atomic Chemistry

An ____________ is a substance that cannot be broken down into any other substance.

• atom

• element

• chemical

• compound

Every element is made up of _______________.

• different compounds

• different atoms

• molecules

• its own type of atom

Everything in the universe contains atoms of at least one or more elements.

• True

• False

The periodic tables lists all the known elements and groups together those with __________________

• different properties

• similar properties

• equal properties

• reactive properties

How many elements are in the Periodic Table?

• 118

• 188

• 108

• 18

Most elements are ______.

• gas

• non-metals

• metals

• solid

What is the only metal that is liquid at room temperature?

• aluminum

• gold

• mercury

• sulfur

Most non-metals are __________

• liquids

• solids

• gases

• plasma

Each atom consists of...

• a small, dense, positively charged nucleus

• a large, dense, negatively-charged nucleus

• much lighter, negatively-charged electrons

• much light, neutrally-charged electrons

What is the simplest atom?

• helium atom

• carbon atom

• oxygen atom

• hydrogen atom