Chemistry CW 1

1. elements in group 18 of the periodic table that share similar properties such as a full outer electron shell
2. A chart of all known elements that scientists reference when working with atoms or molecules
5. Protons and neutrons clump together at the center of an atom to form the ___________ of an atom.
8. Elements that are good conductors of electricity and thermal energy and are often solid at room temperature.
9. Anything that has mass and takes up space.
10. The average mass of the nucleus of that element.
12. ________ electron is a located in the outermost shell of an atom
14. elements in group 17 of the periodic table that need only one electron to complete its outer electron shell
19. Elements arranged in vertical columns of the periodic table that share the same properties.
20. elements in group 2 of the periodic table that are characterized as metals and only have two valence electrons
21. ________ family are the elements in group 15
22. A positively charged subatomic particle located at the center of an atom.
24. Characteristics of elements that help to identify what they are.
26. An abbreviation for the name of an element on the periodic table.

1. A subatomic particle with no charge located at the center of an atom.
3. A subatomic particle of an atom that is negatively charged and orbits the nucleus extremely fast.
4. someone who studies chemistry
6. elements in group 1 of the periodic table that are characterized as metals and only have one valence electron
7. Repeating rows of the periodic table that demonstrate patterns of how elements are arranged.
11. Two or more atoms bonded together.
13. when an element has more than one possibility for the number of neutrons
15. The number of protons in the nucleus of each element.
16. _______ family are the elements in group 16
17. ________ family are the elements in group 13
18. The basic unit of an element.
23. this is where the electrons in an atom are found
25. ________ family are the elements in group 14