Unit 5: Periodic Table

Which group would create a formula of the highest oxide of this element is X0₂ . 

Which element is the most reactive nonmetal?

As you go across from left to right on the periodic table, atomic radius increases.

Which of the following would have the smallest atomic radius?

Reactivity decreases as you go down the group of Alkali metals on the periodic table.

Which of the following elements would be an example of a "metalloid"? 

Noble gases have the highest ionization energy.

Which group of elements is inert?

Group I Alkali metals don't keep their metallic luster for very long when not covered by oil because 

Density increases as you go down the Halogen group.

A "salt" is commonly a compound of a metal such as sodium with an element from 

Which group on the periodic table has elements of all three states of matter?

As you go down the Alkali metals (group IA), ionization energy decreases.

Mendeleev ordered his periodic table by increasing atomic mass.

A Noble gas atom