Biology Vocabulary

1. scale / measurement system to determine the amount of hydrogen ions in a solution
3. number / number of protons, indicated above the symbol
5. / a protein that acts a catalyst in living cells
6. / a short representation
8. / a mixture in which one substance is dissolved in water
9. electrons / electrons in the outer most orbit of the nucleus
12. / solution in which the materials does dissolve but breaks into tiny particles that float within
14. / attraction of molecules of different substances
15. / neutral particle
16. / center of the atom

1. / positively charged particle
2. / pure substance, one type of atom
4. / two or more substance mixed together physically
6. / what does the dissolving
7. / negatively charged particle
10. / atoms combined chemically through bonding
11. number / number of protons and neutrons together, indicated below the symbol
12. / what is dissolved
13. / an atom with increased number of neutrons