Matter Part 1: Assessment

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What does the periodic table represent?

Back

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

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties and can be separated by physical means.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals, such as silicon (Si) and germanium (Ge).

Front

What is the significance of the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, reflecting the number of protons and neutrons in the nucleus.

Front

What is the difference between a solution and a mixture?

Back

A solution is a homogeneous mixture where one substance is dissolved in another, while a mixture can be heterogeneous.

Front

What is the role of the periodic table in chemistry?

Back

The periodic table helps predict the properties of elements and their compounds based on their position.