Across
- 5. reaction is a chemical reaction that releases energy through light or heat.
- 7. is examining materials by separating them into their components
- 9. horizontal row of the periodic table.
- 10. five non-metallic elements found in group 17 of the periodic table.
Down
- 1. reaction or process accompanied by or requiring the absorption of heat.
- 2. the vertical columns on the periodic table
- 3. the branch of science that explores the chemical processes within and related to living organisms.
- 4. a substance that an enzyme acts on to produce a chemical reaction
- 6. this group is also known as the oxygen family.
- 8. is an atom or molecule that has a net electrical charge