cations and anions Flashcards
what is a cation
A cation is a positively charged ion that forms when an atoms loses electrons.
which atoms form cations
Atoms that have almost empty outer shells form cations because is much easier to lose one or two electrons than to gain six or seven electrons.
what type of atoms form cations
Cations are usually formed from metal atom.
what is an anion
An Anion is a negatively charged ion that forms when an atoms gains electrons
what atoms form anions
Atoms that have almost full outer shells tend to form anions, because it is much easier to gain one or two electros than to lose six or seven electrons.
charge +
lithium (Li), potassium (K), ammonium (NH4), sodium (Na), silver (Ag), hydronium (H3O)
charge 2+
magnesium (Mg), Barium (Ba), iron (II), calcium, xinc, strontium, lead, cobalt (II), copper (II)
charge 3+
aluminium
charge -
fluride, bromide, chloride, iodide, hydroxide (OH), nitrate (NO3)
charge 2-
oxide, carbonate (CO3), sulfate (SO4), sulfide
charge 3-
phosphate (PO4)