Chemistry "Must Knows" - Adv Chemistry 2025-26

Hydrogen (symbol, family, group, common ion)

H, alkali metals, IA/1, +1

Lithium (symbol, family, group, common ion)

Li, alkali metals, IA/1, +1

Sodium (symbol, family, group, common ion)

Na, alkali metals, IA/1, +1

Potassium (symbol, family, group, common ion)

K, alkali metals, IA/1, +1

Rubidium (symbol, family, group, common ion)

Rb, alkali metals, IA/1, +1

Cesium (symbol, family, group, common ion)

Cs, alkali metals, IA/1, +1

Francium (symbol, family, group, common ion)

Fr, alkali metals, IA/1, +1

Beryllium (symbol, family, group, common ion)

Be, alkaline earth metals, IIA/2, +2

Magnesium (symbol, family, group, common ion)

Mg, alkaline earth metals, IIA/2, +2

Calcium (symbol, family, group, common ion)

Ca, alkaline earth metals, IIA/2, +2

Strontium (symbol, family, group, common ion)

Sr, alkaline earth metals, IIA/2, +2

Barium (symbol, family, group, common ion)

Ba, alkaline earth metals, IIA/2, +2

Radium (symbol, family, group, common ion)

Ra, alkaline earth metals, IIA/2, +2

Scandium (symbol, family, group, common ion)

Sc, transition metals, IIIB-8B/3-12, variable

Vanadium (symbol, family, group, common ion)

V, transition metals, IIIB-8B/3-12, variable

Titantium (symbol, family, group, common ion)

Ti, transition metals, IIIB-8B/3-12, variable

Chromium (symbol, family, group, common ion)

Cr, transition metals, IIIB-8B/3-12, variable

Manganese (symbol, family, group, common ion)

Mn, transition metals, IIIB-8B/3-12, variable

Iron (symbol, family, group, common ion)

Fe, transition metals, IIIB-8B/3-12, variable

Cobalt (symbol, family, group, common ion)

Co, transition metals, IIIB-8B/3-12, variable

Nickel (symbol, family, group, common ion)

Ni, transition metals, IIIB-8B/3-12, variable

Copper (symbol, family, group, common ion)

Cu, transition metals, IIIB-8B/3-12, variable

Zinc (symbol, family, group, common ion)

Zn, transition metals, IIIB-8B/3-12, variable

Silver (symbol, family, group, common ion)

Ag, transition metals, IIIB-8B/3-12, variable

Gold (symbol, family, group, common ion)

Au, transition metals, IIIB-8B/3-12, variable

Plutonium (symbol, family, group, common ion)

Pu, transition metals, IIIB-8B/3-12, variable

Uranium (symbol, family, group, common ion)

U, transition metals, IIIB-8B/3-12, variable

Boron (symbol, family, group, common ion)

B, borons, IIA/13, +3

Carbon (symbol, family, group, common ion)

C, carbons, IVA/14, +/-4

Silicon (symbol, family, group, common ion)

S, carbons, IVA/14, +/-4

Nitrogen (symbol, family, group, common ion)

N, nitrogens, VA/15, -3

Phosphorus (symbol, family, group, common ion)

P, nitrogens, VA/15, -3

Oxygen (symbol, family, group, common ion)

O, oxygens, IVA/16, -2

Sulfur (symbol, family, group, common ion)

S, oxygens, IVA/16, -2

Fluorine (symbol, family, group, common ion)

F, halogens, VIIA/17, -1

Chlorine (symbol, family, group, common ion)

Cl, halogens, VIIA/17, -1

Bromine (symbol, family, group, common ion)

Br, halogens, VIIA/17, -1

Iodine (symbol, family, group, common ion)

I, halogens, VIIA/17, -1

Helium (symbol, family, group, common ion)

He, noble gases, VIIIA/18, 0

Neon (symbol, family, group, common ion)

Ne, noble gases, VIIIA/18, 0

Argon (symbol, family, group, common ion)

Ar, noble gases, VIIIA/18, 0

Krypton (symbol, family, group, common ion)

Kr, noble gases, VIIIA/18, 0

Xenon (symbol, family, group, common ion)

Xe, noble gases, VIIIA/18, 0

Radon (symbol, family, group, common ion)

Rn, noble gases, VIIIA/18, 0

Acetate

C₂H₃O₂^-1, CH₃COO^-1

Nitrite

NO₂^-1

Chlorite

ClO₂^-1

Carbonate

CO₃^-2

Chromate

CrO₄^-2

Sulfite

SO₃^-2

Ammonium

NH₄⁺¹

Nitrate

NO₃^-1

Chlorate

ClO₃^-1

Hydrogen Carbonate

HCO₃^-1

Dichromate

Cr₂O₇^-2

Sulfate

SO₄^-2

Cyanide

CN^-1

Hypochlorite

ClO^-1

Perchlorate

ClO₄^-1

Hydroxide

OH^-1

Phosphate

PO₄^-3

Permanganate

MnO₄^-1