1.Why is chlorine smaller than sodium? (multiple choice)
-Because it has a greater nuclear charge and pulls electrons inward
-Because it has more energy levels
-Because it has less energy levels
-Because it has less protons

2.Which set of elements is in decreasing in size of atomic radius?(multiple choice)
-K, Ca, Se, Br
-Rb, K, Fr, Be
-Li, Na, Rb, Cs
-F, O, N, C

3.What element has the smallest atomic radius?(multiple choice)
-Sodium
-Chlorine
-Potassium
-Bromine

4.Which has a smaller radius O atom or O-2 ion?

5.Which one of the following sets is in order of decreasing electronegativity?(multiple choice)
-Zn, Co, V, K
-Na, F, Cs, Fr
-Po, Se, S, O
-Be, Ca, Li, F

6.Which of the following elements has the lowest electronegativity?(multiple choice)
-Sulfur
-Gallium
-Potassium
-Cesium

7.What is the definition of electronegativity(multiple choice)
-The amount of energy required to remove an outermost electron
-The desire to attract or pull in an electron
-The size of the atom
-The atomic weight of an element

8.What element would have the smallest radius according to the trend?(multiple choice)
-Fluorine
-Francium
-Hydrogen
-Helium

9.Why is Oxygen smaller than Selenium?(multiple choice)
-It has more protons in the nucleus pulling the electrons inward
-It has less protons in the nucleus pulling the electrons inward
-It has more protons in the valence shell
-it has only 2 energy levels and selenium has four

10.Where area of the periodic table has the highest ionization energy?(multiple choice)
-Upper left
-upper right
-lower left
-lower right