Table arranged horizontally in order of increasing atomic number and vertically in columns of elements with similar chemical properties

• Reactivity Series

• Periodic Table

• Table of Contents

• Multiplication Table

number of protons in the nucleus of an atom; the periodic table is arranged based on this

• Atomic Mass

• Number of Neutrons

• Atomic Number

• Number of Orbitals

average mass of an atom of an element

• Atomic Mass

• Atomic Weight

• Atomic Number

• Atomic Size

Rows of elements are arranged horizontally based on increasing atomic number

• Group

• Family

• Period

• Column

Columns (up and down); vertical arrangement Elements have similar chemical properties and the same valence electrons

• Period

• Row

• Group

• Halogens

elements that have the same number of valence electrons with similar chemical properties

• Period

• Row

• Halogens

• Family

an expression that states the number and type of atoms present in a molecule of a substance

• Chemical Property

• Chemical Formula

• Chemical Equation

• Chemical Agent

malleable, ductile, luster (shiny), good conductors of heat and electricity (left side of periodic table)

• non-metals

• halogens

• metals

• noble gases

Elements that are poor conductors of heat and electric current (right side of periodic table)

• noble gases

• non-metals

• metalloids

• metals

Elements that share some properties with metals and some properties with non-metals. (located along staircase of the periodic table)

• metals

• halogens

• non-metals

• metalloids