Matter Vocabulary

2. when an atom shares an electron in its outermost energy level with another atom
3. contains atoms of 2 or more elements
5. made up of only one type of atom and cannot be broken down by normal chemical or physical means
6. evenly mixed throughout
9. describes a change that occurs when one substance reacts with another
11. anything that has mass and takes up space
14. in fixed positions relative to each other; tightly packed and can't move around each other
15. atoms of the same element with different number of neutrons
17. have more energy than solids or liquids
19. 2 or more substances that are not chemically combined
20. have a negative electrical charge
23. equal to the number of protons found in an atom
24. the act or state of sticking together tightly
26. have no electrical charge
27. have a positive electrical charge
28. a group of atoms connected by covalent bonds
29. whats being dissolved

1. not mixed evenly
4. made up of only one kind of atom
7. particles that are attracted to each other , but aren't in fixed positions
8. a chemical bond formed when one atom gives up one or more electrons to another atom
10. a bond exclusively between metals
12. forces that hold the atoms together in compounds
13. the total number of neutrons in an atom
16. what's doing the dissolving
18. the most common state of matter in the universe
21. electrically charged atoms
22. the measure of how compact the mass in a substance or object is
23. the basic unit or building blocks of matter
25. when a hydrogen atom is attracted to a strongly electronegative atom
27. properties of matter that do not change a substance into a new substance