Across
- 2. Horizontal column in periodic table
- 5. involving absorption of energy
- 6. reaction in which reactants combine
- 8. symbol symbol used to represent elements
- 9. containing two or more atoms
- 10. bond in which electrons are shared
- 13. bond in which electrons are gained or lost
- 14. Something in which the solute is dissolved
- 15. number of protons
- 18. positive mass in an atom
- 19. Components physically combined
Down
- 1. contains protons, electrons and neutrons
- 3. involving releasing of energy
- 4. reaction in which reactant separates
- 7. very reactive gases
- 11. molecule containing two atoms
- 12. vertical column in periodic table
- 16. pure substance that cannot be broken down.
- 17. Something dissolved in solvent
- 20. atom in which there is a charge