Chemistry Vocab

1. – A substance that increases H₃O⁺ ion concentration in water.
4. CHANGE – A process that creates one or more new substances.
7. – A measure of the total heat content of a system at constant pressure.
9. – Groups of two or more atoms bonded together.
10. – The physical form of matter: solid, liquid, or gas.
14. – A reaction that absorbs heat, causing the temperature to drop.
15. – A mixture in which particles eventually settle at the bottom.
17. – Substances formed at the end of a chemical reaction.
18. – A very small piece of matter.
19. – A combination of substances that can be separated.
21. – Substances that start a chemical reaction.
22. – A reaction that releases heat, raising the temperature of the surroundings.

2. – A mixture where particles are between the size of those in a solution and suspension.
3. – A scale that measures acidity or alkalinity of a solution.
4. – A substance that speeds up a chemical reaction without being used up.
5. – A chemical reaction where a substance reacts with oxygen, producing heat and light.
6. – A substance that increases OH⁻ ion concentration in water.
8. – Positively charged particles found in the nucleus of an atom.
9. – Anything that has mass and takes up space.
11. – The smallest unit of an element that retains its properties.
12. CHANGE – A change that does not alter the chemical makeup of a substance.
13. – To spread evenly into another substance to form a solution.
16. – Negatively charged particles that orbit an atom's nucleus.
18. – A solid that forms and settles when two solutions react.
20. – A mixture where one substance dissolves in another.