I couldn't figure a few of these true or false out. If the statement is false, the word in quotes needs to be changed to make the statement true:

Na+ and K+ are "needed" for body cells, such as nerve cells, to conduct electrical impulses.

A "true solution" has extremely small solute particles.

A pH of 1.0 indicates a strongly "basic" solution.

Water is a "polar covalent" compound.

A bond formed between two like atoms is always an "ionic" bond.

Sand and water constitute a "solution".

When an atom completely loses an electron to another atom, it becomes an "anion".

The atomic number of oxygen is 8. Therefore, oxygen atoms always contain 8 "neutrons".

A compound must contain "hydrogen" to be considered an organic compound.