I have 15 questions and I really need help

That living things consist of atoms of different elements.

The structure of an atom (protons, neutrons, and electrons).

What distinguishes elements from one another.

That carbon is an essential part of all macromolecules.

The unique bonding properties of carbon.

The relationship between monomers and polymers.

The characteristics, structures (monomers), and examples of each macromolecule.

That bonds break and form in chemical reactions.

That chemical reactions absorb or release energy.

The function of enzymes in biological reactions.

The lock and key model and how it relates to enzyme function.

The proper way to write a chemical equation.

The purpose of a pH measurement.

Where acids, bases and neutral solutions fall on the pH number line (from 0 to 14).

The properties of water which make it so useful to living organisms.