Chemistry - Unit 1 Vocab

24 terms with definitions

Matter

density in stuff a substance has

Element

only 1 type of atom is present

Compound

2 or more atoms are bonded chemically

Pure Substance

1 chemical formula to describe a substance

Heterogeneous Mixture

substances don’t mix uniformly, (multiple phases)

Homogeneous Mixture

substances mix uniformly, (cannot see more than 1 phase)

Physical Change

properties may be different but chemically is the same.

Physical Property

characteristic of  a substance that doesn’t change it chemically

Chemical Change

a change chemically

Chemical Property

potential of a substance reacting with another substance, (changes chemically)

Density

compactness, matter must have density

Solid

firm and stable in place, (atoms close and vibrating)

 Liquid

takes up form of container, (atoms moving around but still clumped)

Gas

expand freely, (atoms bounce of each other & walls)

Filtering

heterogeneous, (based on state of matter and density) Solid and Liquid

Chromatography

separation of multiple homogeneously (mixed solids in a liquid)

Evaporation

homogeneous, (based on boiling point) Solid and Liquid

Decanting

heterogeneous, (based on density and polarity) Liquid and Liquid

Centrifuging

separated solids that don't fully dissolve or settle

Distilling

homogeneous, (separation based on boiling point)

Inert

non or little reactant substance (noble gases)

Molecule

 2 or more atoms are chemically bonded

Gas pressure

force by collisions of gas molecules with the walls of their container

Temperature

the measure of average kinetic energy (Kelvin)