CHEM ATTRACTION

Metal reactivity

lose an electron

Non metal reactivity

gain an electron

Atomic radius

the distance from the nucleus to the valence shell

Ionization energy

the energy required to remove a valence electron

Electronegativity

the attraction between one atom’s valence electron to another atom’s nucleus

Down a group

attraction decreases

Across a period

attraction increases, nuclear charge increases, distance and shielding stays the same

Noble gases

Non reactive, have a complete valence shell (8 valence electrons)

Ion

an atom with charge

Cation

positively charged atom

Anion

Negatively charged atom

+

subtracting from valence level

-

adding to valence level

Alkali metals

group 1

Alkali earth metals

group 2

Transition metals

groups 3-12

Metalloids

the staircase

Boron family

group 13

Carbon family

group 14

Nitrogen family

group 15

Oxygen family

group 16

Halogens

group 17

Noble gases

group 18