Elements, Compounds, and Chemical Changes Flashcards

Flashcards covering elements, compounds, physical/chemical changes, and acids/bases.

Element

Substance made up of only one type of atom (e.g., Gold).

Compound

A substance made up of two or more atoms chemically bonded together (e.g. H2O).

Al2O3

Compound containing 2 Aluminum atoms and 3 Oxygen atoms.

CaBr2

Compound containing 1 Calcium atom and 2 Bromine atoms.

CH4

Compound containing 1 Carbon atom and 4 Hydrogen atoms.

O3

Element containing 3 Oxygen atoms.

Metals Properties

Shiny, malleable, ductile, good conductors of electricity and heat, solid.

Non-Metals Properties

Brittle, dull, not ductile, poor conductors, mostly gases or brittle solids.

Groups (Periodic Table)

Vertical columns in the periodic table.

Periods (Periodic Table)

Horizontal rows in the periodic table.

Solid (Water)

Molecules tightly packed.

Liquid (Water)

Molecules close together but slide past each other.

Gas (Water)

Molecules are far apart and zoom past one another.

Chemical Change Signs

Change in color, sound or light produced, formation of gas, change in temperature, formation of or disappearance of solid.

Burning a Candle

Chemical Change

Crushing a Can

Physical Change

Setting off Fireworks

Chemical Change

Melting Ice Cream

Physical Change

Car Rusting

Chemical Change

Independent Variable

Something that changes.

Dependent Variable

Something you measure.

Controlled Variable

Everything kept the same.