Unit 1 Summative Assessment

2. Tendency of an atom to attract electrons to itself when it combines with another element.
4. The possible locations around an atom where electrons having specific energy values (quantum number) may be found. Divided into sublevels s, p, d, and f.
7. represent the number of valence electrons.
9. Absorbed when an electron moves from its ground state to its excited state.
11. Atomic Mass Number - Atomic Number
12. Atoms of the same element which have a different Mass Number due to a differing number of neutrons.
14. When filling sublevels other than s, electrons are placed in individual orbitals before they are paired up.
15. If there are two electrons in an orbital, they must have opposite (paired) spins.
16. Tendency of an atom to attract electrons to itself when it combines with another element.
20. The center of an atom. Contains the protons and neutrons.Has an overall positive charge.
21. Energy given off in the form of light by an excited electron.

1. the most probable location for finding an electron.
2. A shorthand method of writing the location of electrons by sublevels.
3. Vertical Column on the periodic table.
5. Atoms or groups of atoms with a charge.
6. Positively Charged Ions.
8. Principal energy levels are broken down into these...
10. Negatively charged Ions.
13. Depends on the number of energy levels and the overall charge of the nucleus .
16. Negatively charged subatomic particles.
17. Neutrally charged subatomic particle.
18. Identifies an element. The number of protons.
19. Positively charged subatomic particle. Contained inside the nucleus.
21. Horizontal row on the periodic table.