Across
- 3. Na+, Mg2+, Al3+,NH4+
- 5. A chemical rule of thumb that reflects observation that atoms of main group elements tend to bond.
- 6. An atom as a small, positively charged nucleus surrounded by electrons.
- 8. The outer shell electron that is associated with an atom.
- 9. An equation in which each side has the same number of atoms of each element.
- 12. Any system closed to all transfers of matter and energy.
- 14. A table of the chemical elements arranged in order of atomic number.
- 15. Are substances initially presented in a chemical reaction that are consumed during the reaction to make products.
- 18. A number in front of a chemical like 2H2o
- 19. AB + CD ---> CB + AD
- 21. A solution in which the solvent is water.
- 22. A substance that is formed as the result of a chemical reaction.
- 23. Bonds form to make atoms “happy” and allow atoms to follow the octet rule.
- 25. A chemical bond that involves the sharing of electron pairs between atoms.
Down
- 1. A reaction in which the atoms of one element replace the atoms of a second element.
- 2. A chemical bond that generates two oppositely charged ions.
- 4. 1s2s2p
- 7. A reaction in which a single compound is broken down into simpler substances.
- 10. A diagram that shows bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.
- 11. CH4 + 2O2 ---> CO2 + 2H2O
- 13. Chemical formulas in place of chemical names
- 16. Nitrate ion (NO3-)
- 17. A + B ---> AB
- 20. Hydrochloric acid (HCL), Nitric acid (HNO3)
- 24. A negatively charged ion