Periodic Table Review

Atomic number 3

• cobalt

• lithium

• hydrogen

• chlorine

only nonmetal in group 1

• chlorine

• bismuth

• hydrogen

• helium

element used to clean pools

• barium

• oxygen

• neon

• chlorine

only metal in group 15

• phosphorus

• bismuth

• antimony

• nitrogen

average atomic mass of 16

• oxygen

• bismuth

• nitrogen

• iodine

56 protons

• chlorine

• cesium

• barium

• gallium

group 13 and period 4

• aluminum

• boron

• indium

• gallium

period 5 and has 7 valence electrons

• antimony

• iodine

• tin

• bromine

3 energy levels and is an alkaline earth metal

• sodium

• calcium

• aluminum

• magnesium

most reactive nonmetal

• fluorine

• astatine

• lithium

• francium