Chemistry

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Across
  1. 4. Mass number = number of ________
  2. 5. Bond between two metals
  3. 7. Decay where a neutron changes to a proton and electron
  4. 8. Material made of only one substance
  5. 10. Location of most mass of an atom
  6. 12. Reaction type where new substance is formed
  7. 13. Type of covalent bond where sharing isn't equal
  8. 15. Using mass or moles of one substance to find mass or moles of another substance
  9. 16. Reaction type where substance doesn't change
  10. 17. 6.022 x 10^23, unit of measure of molecules in a substance
  11. 18. Bond where metal takes electrons from nonmetal
Down
  1. 1. Bond where two nonmetals share electrons
  2. 2. Decay where only energy is released
  3. 3. Material made of two or more substances
  4. 6. The _____ of all substances in a reaction must be equal
  5. 9. All flammable objects catch fire
  6. 10. Number of protons = atomic ________
  7. 11. Reaction where a hydrocarbon and oxygen combine to make water and carbon dioxide
  8. 14. Decay where a helium nucleus is produced
  9. 16. Row on the periodic table