The Periodic Table

Front

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

Back

Metals

Front

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

Back

family

Front

Sodium (Na) is found in period _____

Back

3

Front

The mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom is called _____

Back

atomic mass

Front

A unique number for each element that equals the number of protons in an atom of that element is called _____

Back

atomic number

Front

The horizontal rows in the periodic table are called _____

Back

periods

Front

Elements that have properties of both metals and nonmetals are called _____

Back

metalloids

Front

The vertical columns in the periodic table are known as _____

Back

groups or families

Front

The element with the atomic number 1 is _____

Back

Hydrogen

Front

The periodic table is organized by increasing _____

Back

atomic number