Cannot be broken down-

The periodic table classifies elements according to their-

Horizontal rows on the periodic table are called-

Within the period, as you read from left to right the atomic number -

Elements in the vertical columns on the periodic table are called-

Elements within a group have similar-

Elements that are so reactive that they are never found alone in nature-

Name of Elements in Group 1

Name of Elements in Group 2

Elements that are less reactive than alkali in nature-

Elements located between group 2 and 13-

Elements that include familiar metals like iron, copper, silver, and gold-

Group name of elements in Group 17-

Group name of elements in Group 16-

Group name of elements in Group 15-

Group name of elements in Group 14-

Group of elements in group 18 that rarely react with other elements-

Group of elements placed at the bottom of the periodic table-

An element placed in group 1 because its internal structure and reactivity is similar to those in the alkali metals-

Alchemist tested all known substances, and set the stage for elements-

The elements on either side of the darkline are called-

Metals are poor conductors of heat and electricity-

Metals are usually shiny in appearance-

Metals break or shatter instead of bend-

Cannot be chemically broken down into simpler substances-

Elements that occur in nature are called-

Elements made by scientist in the laboratory-

Group of elements that are sometimes called the rare earth elements-

Radioactive elements that gives off high energy particles-