PbS is lead (II) sulfide, which contains lead and sulfur.
Pb(CH3COO)2 is the chemical formula of lead(II) acetate.
Since oxygen is not a metal, its ions are not normally written with Roman numbers suffixed, but an oxide ion, with formula O-2, contains 10 electrons.
Lead (II) Sulfite
Lead is a metal with an electronegativity of 2.33. This is very high for a metal. A simple prediction is that reactions with non metals of low electronegativity will form covalent bonds and with non metals of high electronegativity will form bonds which are ionic /covalent borderline. This is essentially what is found, for example, PbO is more ionic than PbS. PbS is essentially ionic but is also a semiconductor- so there is a covalent component to the bonding. Lead has two oxidation states, lead(II) and lead(IV). the more stable state is lead(II). The first two ionization energies are similar to magnesium. Lead forms Pb2+ salts such as Pb(NO3)2 unlike most lead(II) salts this is soluble in water, and PbSO4 (found in car batteries), which is insoluble, and PbCO3 another insoluble salt called white lead when it was used in paints. Lead(IV) compounds are not generally ionic - the ion Pb4+ would be highly polarising and would lead to covalent bonding, PbF4 is the most ionic - it is a high melting solid with a structure like SnF4. It is thermally unstable decomposing to produce fluorine.
Examples are: PbO, PbNO3, PbCl, PbS, etc.
PbCO
PbCO
PbS is lead (II) sulfide, which contains lead and sulfur.
Pb2+ is the lead(II) ion formula
Lead is chemically written as Pb2+, an double positive ion (cation)
Lead (IV) ion
Pb2+
the lead(II) ion
Lead compounds tend to be blue in flame tests
PbCl2 is lead(II) chloride, PbCl4 is lead(IV) chloride
It is Lead Carbonate, but to be more specific, it is Lead (II) Carbonate. Lead can have a charge of +2 or +4. A carbonate ion has a charge or -2. So, in order for the chemical formula to be PbCO3 the lead ion must have a charge of +2, hence the (II) between the lead and carbonate.