Chem Periodic Table Quiz

An element that is a very reactive gas is most likely a member of the...

• noble gases

• alkali metals

• halogens

• actinides

The noble gases have ____ electrons in their outer energy levels.

• few
• about a half-complete set of
• an almost complete set of
• a complete set of

Elements in a family or group in the periodic table often share similar properties because...

• they look alike.
• they are found in the same place on Earth.
• they have the same physical state
• their atoms have the same number of electrons in their outer energy level

Alkali metals are the most reactive of all the metals because they have ____ electron(s) in their outer energy level.

• 1
  
• 2
• 7
• 8

Why is hydrogen placed above Group 1 in the periodic table?

• Like Group 1 metals, hydrogen is a metal soft enough to be cut with a knife.
• Like atoms of Group 1 metals, hydrogen atoms have only one electron in their outer level.
• Hydrogen has the same atomic mass as Group 1 metals.
• Hydrogen has the same density as Group 1 metals.

Electrons are found in the third energy level for which of the following elements:

• Hydrogen

• Aluminum

• Boron

• Lithium

T or F: Elements in the 18th column are unreactive.

• True

• False

True or False: There are more metals than nonmetals on the periodic table.

• True

• False

Valence electrons are...

• the total number of electrons in an atom

• the number of electrons on the first energy shell of an atom

• the number of electrons on the outermost energy shell of an atom

The ______ tells you how many valence electrons an atom has.

• group number

• period number