Biology Vocab

2. The chemical combination of 2 or more elements in definite proportions
4. Formed when electrons are shared between atoms
10. The attraction between molecules of different substances
11. The basic unit of matter
12. Prevents sharp, sudden changes in pH
14. a type of chemical bond that is formed when electrons are shared equally between two atoms
16. Mixture Parts are unevenly mixed
18. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
19. Does the dissolving
20. Compound that forms H+ ions in a solution

1. The attraction between atoms of the same substances
3. A bond formed between two atoms with a difference in electronegativities by sharing electrons
5. Any compound that forms OH- ions in a solution
6. A mixture of water and undissolved material
7. A homogenous mixture
8. made when two or more substances are combined, but they are not combined chemically
9. Parts of a mixture that are evenly mixed
13. Substance that is dissolved
15. Formed when ions of opposite charges are attracted to one another
17. Pure substances consisting of all the same type of atom