Chapter 16 - Periodic Table

Elements on the periodic table are classified as metals, nonmetals, and __________.

_____ is a horizontal row in the periodic table.

How many outermost (valence) electrons do lithium and potassium have?

The particles that make up protons and neutrons are called _____.

Atoms with the same number of protons but different numbers of neutrons are _______.

______ is the weighted-average mass of all the known isotopes for an element.

Is the charge of the center of an atom positive, negative, or neutral?

Most of the elements to the left of the stair step line in the periodic table are ___

The electrons are located in the electron ________.

The _____ is the sum of the number of protons and neutrons in an atom.

Why does neon and argon have similar chemical properties?