4.1-4.3 Symbols, equations and Formulae

H2

________ has two hydrogen atoms, while HCl contains one hydrogen atom and one chlorine atom.

Hydrogen

________ and chlorine combined is called ________ chloride.

KOH

________ is potassium hydroxide, CaCO3 is calcium carbonate.

metal

If one is a(n) ________ and the other a nonmetal, then the name of the ________ atom comes first and the ending of the second atom is replaced by adding- ide.

Carbon

________ and oxygen combine to form CO2 which is ________ dioxide since ________ is in Group 4 and oxygen in Group 6.

Non metal compounds

________ could be solids, liquids or gases, so it depends on chemical structure.

Group IV

Carbon, for example, belongs to ________, which means that a single carbon atom can form four single bonds or two double bonds.

conversion of reactants

The arrow (which is spoken as "goes to "or "produces) "implies the ________ into products.

concept of valency

The ________ is utilized to deduce compound formulas.

The following nonmetals must be written as molecules

H2, N2, O2, F2, Cl2, Br2 and I2

RAM (Ar)

Fe = 63.5    O = 16