Periodic Table Vocabulary

Front

An element's identity is determined by the number of __________.

Back

protons

Front

In the modern periodic table, elements are arranged by __________.

Back

atomic number

Front

Elements to the right of the stair step on the periodic table are __________.

Back

nonmetals

Front

An element with characteristics of metals and nonmetals is called a __________.

Back

metalloid

Front

Mendeleev arranged his periodic table according to __________ and chemical properties of elements.

Back

atomic mass

Front

The horizontal rows in the periodic table are called __________.

Back

periods

Front

The vertical columns in the periodic table are known as __________.

Back

groups or families

Front

Elements in the same group of the periodic table have similar __________.

Back

chemical properties

Front

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

Back

alkali metals

Front

The elements in group 17 of the periodic table are called __________.

Back

halogens