Which family is found to the left of the stair step line?

Group 1 on the periodic table

Elements in groups 3 through 12 on the periodic table

Which group follows the element lanthanum?

Noble Gases have ____ electrons in the outer energy level

Different forms of the same element with different molecular structures

Group 16 on the periodic table

Group 2 on the periodic table:

elements that usually are gases or brittle solids at room temperature

Elements having more than 92 protons

molecule that consists of two atoms of the same element, joined by a covalent bond

property of metals and alloys that allows them to be hammered or rolled into thin sheets

element, such as radium, whose nucleus breaks down and emits particles and energy

A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.

Rows in the Periodic Table are called

Column in the Periodic Table are called

The Periodic Table of elements is arranged according to an element's

positively charged metallic ions are surrounded by a sea of electrons

Different forms of the same element with different molecular structures