The Periodic Table

What element does not match the properties of any other group, so it stands alone. It is placed above group 1 but is not part of that group?

• H

• He

• O

• C

More than 2/3 of the elements on the periodic table are classified as ____

• solids

• liquids

• metals

• nonmetals

The group of elements that are extremely reactive is the _____.

• lanthanides

• transition metals

• alkali metals

• alkaline earth metals

The group of nonmetals which are very reactive, and which tend to form salts with metals are the _____.

• halogens

• noble gases

• transition metals

• alkali metals

The group of nonmetals which are unreactive and gases at room temperature is _________.          

• halogens

• noble gases

• transition metals

• alkali metals

What do groups/families in the periodic table have in common?

• The number of energy levels occupied by electrons.

• The exact same characteristics.

• The number of valence electrons.

• None in any of the choices.

What do the periods on the periodic table have in common?

• The number of energy levels occupied by electrons.

• The exact same characteristics.

• The number of valence electrons.

• None in any of the choices.

An element with two valence electrons is?

• alkali metals

• alkaline earth metals

• halogen

• transition element 

Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs) and Francium (Fr) are in the same column in the periodic table. Why are these elements in the same column in the periodic table?

• They have similar properties.

• They have atoms of the same size. 

• They have the same number of protons.

• They have the same number of neutrons.

Which of the following elements does not belong to period 2?

• Lithium

• Boron

• Argon

• Fluorine