Across
- 2. An atom or molecule that has a positive or negative net charge from losing or gaining electrons.
- 3. The substances that go into and are changed during a chemical reaction.
- 6. Chemical bond in which electrons are shared between atoms to form electron pairs.
- 8. Chemical reaction in which two or more simple substances react, forming a complex product (A + B -> AB).
- 9. A substance made from two or more chemically joined elements.
- 11. Compounds in which oppositely charged ions attract each other.
- 12. Chemical reaction in which a reactant breaks down into two or more products (AB -> A + B).
- 13. Chemical reaction in which two reacting ionic compounds switch places, forming two new products (AB + CD -> AD + CB).
Down
- 1. Chemical reaction in which one element is replaced by another element in a compound (A + BC -> AC + B).
- 4. Number placed in front of a chemical formula, representing how many molecules there are of that formula.
- 5. An element that is never found by itself and is always bonded to another atom (remember: have no fear of ice cold bears).
- 7. Number that comes after and below a symbol, representing how many atoms there are of that element.
- 10. Oxygen combines with an element or a compound, forming an oxide. It releases energy as heat and light.
- 14. The substances formed from chemical reactions.