Classes of Matter & Periodic Table Test Review

Front

What does the atomic number of an element represent?

Back

The atomic number represents the number of protons in the nucleus of an atom of that element.

Front

What is an electron?

Back

An electron is a subatomic particle with a negative charge that orbits the nucleus of an atom.

Front

What is a neutralization reaction?

Back

A neutralization reaction is a chemical reaction in which an acid and a base react to form a salt and water.

Front

What is the pH range of human blood?

Back

The pH range of human blood is between 7.35 and 7.45.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are evenly distributed and the mixture appears uniform throughout.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not evenly distributed and can be easily distinguished.

Front

What is the significance of the periodic table?

Back

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

Front

What are the three main classes of matter?

Back

The three main classes of matter are solids, liquids, and gases.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.

Front

What is an acid?

Back

An acid is a substance that donates protons (H+) in a chemical reaction and has a pH less than 7.