Nature of Matter - Vocabulary

6. Weak acids or bases that can react with strong acids or bases to prevent sudden changes in pH
7. _____ Bond: Bond formed when one or more electrons are transferred from one atom to another
9. Anything that has mass and takes up space
10. A subatomic particle in the nucleus of the atom, with no electrical charge
11. Attraction between molecules of the same substance
14. _____Particles: protons, neutrons, electrons
17. A molecule that shares electrons equally and does not have oppositely charged ends
19. _____ Number: the number of protons in the nucleus of an atom
20. Atomic ____: Sum of protons and neutrons
22. Center of an atom
25. 2 or more elements chemically combined
26. Measurement system used to indicate the concentration of hydrogen ions (H+) in solution; ranges from 0 to 14
27. A combination of two or more substances that are not chemically combined
29. An atom or group of atoms that has a positive or negative charge.
31. A substance that is dissolved in a solution

1. An attraction between molecules of different substances
2. A substance that cannot be broken down into simpler substances
3. Mixture of water and non-dissolved material
4. A subatomic particle that has a positive charge and that is found in the nucleus of an atom
5. Basic unit of matter
7. Atoms of the same element that have different numbers of neutrons
8. Basic unit of life
12. A group of atoms bonded together
13. _____ Bond: Sharing of electrons between two elements
15. A compound that forms H+ ions in solution
16. a one-, two-, or three-letter abbreviation of the name of an element
18. A compound that produces hydroxide ions (OH-) in solution
21. A mixture that forms when one substance dissolves another
23. A number that shows how many atoms of an element are in a molecule
24. The substance in which the solute dissolves
28. A subatomic particle that has a negative charge
30. A molecule in which one side of the molecule is slightly negative and the opposite side is slightly positive