Phys Sci - Unit 2 Pt 2 EC

valence electrons

outside electrons

core electrons

main electrons

is normally a nonmetal

is called an anion

is formed when an atom gains electrons

has more protons than electrons

sodium

magnesium

carbon

bromine

carbon

iron

calcium

helium

chlorine gas a +1 oxidation number and wants to gain 1 electron

potassium has a -1 oxidation number and wants to gain one electron

sodium has 1 valence electron and has a +1 oxidation number

boron has 3 valence electrons and has a -3 oxidation number

metals want to be negatively charged

nonmetals obtain positive charges to become stable

nonmentals want to be positivley charged

nonmetals want to gain electrons

F

Rb

Ar

Al

gaining an electron

losing an electron

bonding with carbon

nothing. It is already stable.

Hg

Na

Mg

Ne

Na

Mg

C

Ne