The Atom and the Periodic Table

An allotrope of carbon that is hard and is often used in jewelry is ________.

The appearance of solid metals can be described as __________.

Elements that lie along the stair-step line of the periodic table are ___________.

A particle that moves around the nucleus is a(n) _________.

Elements that form salts by combining with metals are __________.

Elements that are gases, are brittle, and are poor conductors at room temperature are ________.

Bromine is the only halogen and nonmetal that is normally a ________.

A family of elements that has two electrons in its outer energy level is the _________.

When hydrogen reacts with the active metals, it forms a chemical bond by __________.

Hydrogen is grouped with alkali metals because it __________.

Atoms of the same element with different numbers of neutrons are called _________.

Each inner energy level of an atom has a maximum number of _______ it can hold.

Three transition elements in Group 12 of the periodic table are _________.

Dot diagrams are used to represent __________.

The elements in Groups 3 through 12 of the periodic table are the _______.

A family of elements that contains the most reactive metals is the __________.

The only metal that is a liquid at room temperature is _________.

Horizontal rows on the periodic table are called ________.

At room temperature, most metals are __________.

Substances that conduct an electric current only under certain conditions are most likely to be

A certain atom has 17 protons, 17 electrons, and 18 neutrons. Its mass number is ________.

Metals can be used as wire because they are __________.

A chemical symbol represents the _______ of an element.

The noble gases are in ___________.