The Periodic Table of Elements

Elements in Groups 1, 2, and 13 through 18 are called the..

a row of radioactive elements

elements that show moderate electrical conductivity

most chemically inactive group of elements

another name for Group 2 elements

only nonmetal in Group 1

elements that have similar physical or chemical properties

group of elements that form salts

The most active nonmetal is..

the number of protons in the nucleus of an element’s atoms

elements in Groups 3 through 12 of the periodic table

This is the average number of protons and neutrons of an element including all it's isotopes.

basis for arranging elements in modern periodic table

The majority of the elements on the periodic table are classified as......

a row of elements in the periodic table whose properties change gradually and predictability

elements that are gases or brittle solids and poor conductors of heat and electricity