Atomic Structure / P.T.E. Test Review

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Each element is made up of atoms that have the same number of protons.

Front

What are the three main types of elements on the Periodic Table?

Back

The three main types of elements are metals, nonmetals, and metalloids.

Front

How can you identify a metal?

Back

Metals are typically shiny, good conductors of heat and electricity, malleable, and ductile.

Front

What is a nonmetal?

Back

Nonmetals are elements that are usually dull, poor conductors of heat and electricity, and can be gases or brittle solids at room temperature.

Front

What is a metalloid?

Back

Metalloids are elements that have properties of both metals and nonmetals. They are semiconductors and are often used in electronics.

Front

What is the atomic structure of an atom?

Back

An atom consists of a nucleus containing protons and neutrons, surrounded by electron clouds where electrons are found.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding and reactions.

Front

What is the significance of the Periodic Table of Elements?

Back

The Periodic Table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What are chemical properties?

Back

Chemical properties are characteristics of a substance that become evident during a chemical reaction, such as reactivity and acidity.

Front

What is the difference between atomic number and atomic mass?

Back

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