Using the periodic table and table of common polyatomic ions,

1. write formulas and names for the acids when hydrogen is combined with sulphur,
the halogens and polyatomic anions, and

2. classify the acids as binary or oxo acids.

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.