(H-MOD) Unit 2 CW 1

2. anything that has mass and takes up space
3. the basic particle from which all elements are made
8. Repeating rows of the periodic table that demonstrate patterns of how elements are arranged.
9. The average mass of the nucleus of that element.
10. a group of two or more atoms held together by chemical bonds
13. Elements that are good conductors of electricity and thermal energy and are often solid at room temperature.
14. A subatomic particle with no charge located at the center of an atom.
15. A positively charged subatomic particle located at the center of an atom.
16. Elements arranged in vertical columns of the periodic table that share the same properties.

1. The number of protons in the nucleus of each element.
4. elements that have some properties of metals and some properties of nonmetals
5. An abbreviation for the name of an element on the periodic table.
6. located in the outermost shell of an atom
7. an element that lacks most of the properties of a metal
11. A subatomic particle of an atom that is negatively charged and orbits the nucleus extremely fast.
12. a pure substance that cannot be broken down into any other substance by chemical or physical means