Periodic Trends Intro

1. Fill the blank: Ionization energy increases as you move ________ across a period.
6. Element with two shells and four valence electrons
7. Another term for a vertical column on the periodic table
10. An ion that has a negative charge.
11. Fill the blank: The atomic ________ is a measure of an atom's size.
13. Whose law describes the relationship between electrostatic force, charge, and distance?
14. This element has a nuclear charge of +18
15. Atom with the smallest known radius
16. Radium(Ra) has this many shells
17. The net charge on a neutral atom
18. Term that describes an atom with an equal number of protons and electrons.

2. Fill the blank: As the distance between charged particles decreases, the force between them ________.
3. Fill the blank: The energy required to remove an electron from an atom is the ________ energy.
4. Atom with the largest known radius
5. Fill the blank: Cations always have a ________ charge.
6. An atom that has lost one or more electrons.
8. Another term for a horizontal row on the periodic table
9. Outermost electrons involved in chemical reactions
12. Inner electrons that provide a shield against nuclear pull
19. Fill the blank: Atomic radius decreases as you move ________ a group.