Physical Science Midterm

Noble gases are

-group 18

-don’t react

Halogens are

-Group 17

-most reactive non-metal

Alkali metals are

-Group 1

-most reactive non-metal

Alkaline earth metals are

-group 2

-2nd most reactive non-metal

Metal characteristics

Solid, malleable, high melting point, shiny, conduct heat and electricity

Non-metal characteristics

Solid+gases, brittle, poor conductors of heat and electricity

Metalloid characteristics

Solid, some characteristics of metals and nonmetals

Mass number is

The rounded atomic weight

Number of neutrons is

The mass # minus # of protons

Ionic bonding

Electrons transferred

-metal w/nonmetal (change ending)

-polyatomic (back of sheet)

-transition (Roman numerals)

A mole is

6.02×10²3

Covalent bonding

Electrons shared

-____H→____H

Ion

Has a charge

Isotope

Balanced charge