Unit 4 Periodicity Study Guide

Front

What is the periodic table?

Back

A tabular arrangement of chemical elements, organized by increasing atomic number, where elements with similar properties are grouped together.

Front

What are metals?

Back

Elements that are typically shiny, good conductors of heat and electricity, and malleable.

Front

What are nonmetals?

Back

Elements that are generally poor conductors of heat and electricity, and are often brittle in solid form.

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals, often used as semiconductors.

Front

What are valence electrons?

Back

The number of electrons in the outermost shell of an atom, which determine its chemical properties.

Front

What is atomic radius?

Back

The distance from the nucleus of an atom to the outermost shell of electrons.

Front

Which group contains noble gases?

Back

Group 18 of the periodic table.

Front

What is the significance of the group number in the periodic table?

Back

It indicates the number of valence electrons in the elements of that group.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic number is the number of protons in an atom, while atomic mass is the weighted average mass of an atom's isotopes.

Front

What is a Lewis Dot Structure?

Back

A diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist.