The Periodic Table

The vertical columns in the periodic table are known as _____

• periods

• groups or families

• blocks

• rows

A grouping of elements based on similar properties, arranged by columns in the periodic table; also known as a group

• family

• series

• cluster

• set

The element with the atomic number 1 is _____

• Oxygen

• Hydrogen

• Helium

• Nitrogen

The elements in group 17 of the periodic table are known as _____

• noble gases

• alkali metals

• halogens

• transition metals

The horizontal rows in the periodic table are called _____

• groups

• families

• periods

• blocks

The periodic table is organized by increasing _____

• atomic mass

• atomic number

• molecular weight

• density

The elements in group 1 of the periodic table are known as _____

• alkali metals

• alkaline earth metals

• noble gases

• transition metals

The periodic table was first organized by _____

• Dmitri Mendeleev

• John Dalton

• Marie Curie

• Niels Bohr

Most of the elements on the periodic table are classified as _____

• Metals

• Nonmetals

• Noble gases

• Metalloids

Sodium (Na) is found in period _____

• 1

• 2

• 3

• 4