Across
- 2. Absorbs heat energy
- 4. The smallest part of an element that is representative of that element
- 5. The speed of chemical reaction
- 9. A pure substance formed when at least one metal and one non-metal combines
- 10. Total mass of reactants/Total mass of products
- 15. Occurs when oxygen in air reacts with a substance to form a new one and gives off heat
- 18. Releases heat energy
- 20. Ions with a positive charge
- 21. Neutral particles
- 22. A new substance produced between reactants
- 23. A group of atoms acting as one
- 24. A substance that reacts with another substance to create a new substance with different products/properties
- 25. Slow chemical change that occurs when in the air reacts with a metal
Down
- 1. Makes place in the cells in your body
- 3. Anything on the periodic table that is only made up of one type of atom
- 6. Positively charged particles in the nucleus
- 7. One or more products can escape
- 8. All reactants and all products are accounted for
- 11. The average mass of an element in atomic mass units (amu)
- 12. A combination of symbols that represent a compound and the amount
- 13. A compound formed when two non-metals combine
- 14. An atom or a group of atoms that has become electrically charged because it has lost or gained electrons
- 16. Ions with a negative charge
- 17. Chemical combination of two or more elements in a specific ratio
- 19. The amount of proton it has