Chemistry Crossword

4. a numerical scale ranging from 0-14 that is used to compare the acidity of solutions
5. The rapid reactions of a substance with oxygen to produce oxides and energy
10. The breakdown of a metal resulting from reactions with chemicals in its environment
12. A molecule consisting of only two atoms of either the same or different elements
15. A reaction in which a larger or more complex molecule breaks down to form two (or more) simpler products
17. A bond that results from the sharing of outer electrons between non-metal atoms
18. A solid formed from the reaction of 2 solutions
19. An aqueous solution that conducts electricity, tastes sour, turns blue litmus red, and neutralizes bases
20. The elements in the 17th column of the periodic table
21. A chemical, present at the start of a chemical reaction, that is used up during the reaction

1. A particle in which atoms are joined by covalent bonds
2. A measure of how acidic or basic a solution is
3. Neither acidic nor basic
5. A way of describing a chemical reaction using the chemical formulas of the reactants and products
6. A charged particle that results when an atom gains or loses one or more electrons
7. A row of elements in the periodic table
8. A chemical that is produced during a chemical reaction
9. A column of elements in the periodic table with similar products
11. An aqueous solution that conducts electricity and turns red litmus blue
13. A description of what a substance does as it changes into one or more new substance(s)
14. An ion made up of more than 1 atom that acts as a single particle
16. A compound that separates into ions when it dissolves in water, producing a solution that conducts electricity