Science Vocab

4. A unit of mass used to measure the molecular weight of an atom.
8. A subatomic particle that has a neutral charge and that is found in the nucleus of an atom.
9. A gas element that doesn't readily mix with other elements.
13. The amount of distance between the outer shell of an atom and the nucleus.
15. The difference of protons and electrons, often calulated mathematically with 'P-E'.
16. The set of matallic elements occupying the central portion of the periodic table.
17. A particle such as a neutron, proton, or electron that makes up an atom.
22. A subatomic particle that has a negative charge and that is found in the electron cloud.
23. The area around the nucleus of an atom where the atom's electrons are most likely to be found.

1. An array consisting of elements in a specific order.
2. A column in the periodic table that categorizes the atoms by number of electrons.
3. The number of atoms in the molecules of an element.
5. A letter or figure used to describe things.
6. Smallest particle of an element.
7. The ability something has to change shape easily.
10. The ability of something to be hammered thin or stretched into a wire easily.
11. A row of the periodic table that categorizes atoms by the number of outer shells.
12. The state of being reactive.
14. Reactive nonmetallic elements that form strongly acidic compounds with hydrogen.
18. A subatomic particle that has a positive charge and that is found in the nucleus of an atom.
19. A substance made of purely the same kind of atoms
20. The center of an atom.
21. The distance from the outermost electron to the nucleus.