Biology

1. / Substance dissolved in the solution
3. Scale / Scale that compares the relative concentrations of hydronium ions and hydroxide ions in a solution
7. energy / Energy in a system that is available for work
9. / The measurement of the amount of solute dissolved in a fixed amount of the solution
11. / Quantity of matter an object has
13. / Things on the right side of the equation
14. bond / Two atoms sharing one or more pairs of electrons
16. / The central core of an atom
18. / A solution that contains more hydroxide ions than hydronium ions
20. / An atom or molecule with a charge
21. / Important class of catalysts in living things
22. / The rate at which atoms or molecules of a substance move determines

2. / Pure substance that can not be broken down chemically into simpler kinds of matter
4. Ion / H3O+
5. / simplest part of a substance that retains all the properties of the substance and that can exist in a free state
6. Reaction / Substances change into new or more substances
8. Reaction / Reactions that absorb energy
10. energy / The amount of energy needed to start the reaction
12. Number / Number of protons an atom has
15. / Referring to bases
17. / Substance in which the solute is dissolved
19. Reaction / Reactions in which electrons are transferred between atoms