"Chemistry Vocabulary Quiz Review": HTML5 Crossword

Across

4. One element of hair, a gas. (8)
6. Matter that has weight,volume and shape (5)
7. Amino acids hooked together with peptide bonds. (7,0)
8. Protein of hair. (7)
9. Made up of the protein keratin. (4)
11. Occupies space. (6)
13. Changing a substance without making a new one. (8,6)
16. Smallest unit of an element. (4)
17. Connects amino acids to form chains. (11)
18. Atoms in a molecule orbit around this. (7)
19. An element of hair and H20. (6)

Down

1. Combination of two or more substances. (7)
2. A change that makes a new substance. (8,6)
3. Something with more + ions than - ions (4)
5. Tells if something is acid or alkaline. (9,8)
10. A solution with more H2 ions. (8)
12. Study of matter. (9)
14. Another gas element of hair (8)
15. Two or more atoms linked by a chemical bond. (9)