Chem test

smallest particles having properties of an element

chemically bonded group of atoms existing in a pack

sample having only one type of atom

single atom existing by its self

two of the same elements chemically bonded together

Br,I,N,Cl,H,O,F

two or more elements chemically bonded together

same amount of elements floating throughout,

not the same amount of elements floating throughout

cloudy, scatters light

particles settle out, layers

metals, non metals, metalloids

skimming or pouring off the top of another liquid. used for different densities

spinning a container in a circle, heavier particles will stay in the center while lighter ones spin around

changes affecting the form of a chemical substance, but not its composition

a substance combines with another to create a completely new one

good electrical and heat conductors. luster, malleable, solid @ room temp.

solid @room temp, less malleable, semi conductor, reactivity varies

poor at conducting heat and electr. dull, brittle. powdery (if solid)  reactivity varies

go up and down

go left to right

atomic numbers 57-71 reactive to air. top row of bottom section below main part

atomic numbers 89-103 radioactive. bottom row of section below main part.

no reactive elements in group zero in per. table