Periodic Table

A column of elements on the periodic table

A row of elements on the periodic table

Group 1, 1 electron in outer level, most reactive metals, soft, silver, shiny, low density; lithium, sodium, potassium, rubidium, cesium, francium; react with halogens to form salts

Group 2, 2 electrons in outer level, second most reactive metals; beryllium, magnesium, calcium, strontium, barium, radium

Groups 3-12, 1-2 electrons in the outer energy level, less reactive than alkali-earth metals, shiny, good conductor of thermal energy and electrical current, high density

Found along a zigzag line between metals and nonmetals: boron, silicon, germanium, arsenic, antimony, tellurium; some properties of metals and some of nonmetals

4 valence electrons; second most abundant element in your body

Most abundant element in the atmosphere; important element in living things

Metalloid; second most abundant element in the Earth's crust; good conductor of electricity; used in making computer chips

Most reactive nonmetals; 7 valence electrons; forms salts with metals; fluorine, chlorine, bromine, iodine; located next to noble gas family

Inert gases (at room temp. and standard pressure); doesn't usually react with other elements, 8 valence electrons; helium, neon, argon, krypton, xenon, radon

Mass divided by volume

How tightly packed the matter in a substance is.

Material's ability to allow heat or electric charges to flow; metallic property

Capable of shaping by pounding; metallic property