polyatomic ions and also geometry

hydrogen carbonate

HCO₃⁻

chlorate

ClO₃⁻

chlorite

ClO₂⁻

cyanide

CN⁻

hypochlorite

ClO⁻

phosphate

PO₄³⁻

thiosulfate

S₂O₃²⁻

hydrogen sulfate

HSO₄⁻

sulfate

SO₄²⁻

peroxide

O₂²⁻

hydroxide

OH⁻

Nitrate

NO₃⁻

carbonate

CO₃²⁻

nitrite

NO₂⁻

ammonium

NH₄⁺

acetate

C₂H₃O₂⁻

Permanganate

MnO₄⁻

dichromate

Cr₂O₇²⁻

chromate

CrO₄²⁻

Perchlorate

ClO₄⁻

sp

linear, 180 degree hybridization angle

sp^2

trigonal planar, 120 degree bond angle

sp^3

tetrahedral, 109.5 degree bond angle

sp^3d

trigonal bipyramidal, 120 degree bond angle and 2 90s

sp^3d^2

octahedral, 90 degree bond angles

trigonal with 1 lone pair

bent

tetrahedral with 1 lone pair

trigonal pyramidal

tetrahedral with 2 lone pairs

bent

trigonal bipyramid with 1 lone pair

sawhorse/ seesaw

trigonal bipyramid with 2 lone pairs

t-shaped

trigonal bipyramid with 3 lone pairs

linear

octahedral with 1 lone pair

square pyramid

octahedral with 2 lone pairs

square planar

octahedral with 3 lone pairs

t-shape

octahedral with 4 lone pairs

linear