Matter test practice

Front

How have models of the atom changed over time?

Back

Models of the atom have become more complex over time, reflecting advancements in scientific understanding.

Front

What do isotopes of an element typically have in common?

Back

Isotopes of an element typically have many similar characteristics, such as chemical properties, but differ in atomic mass.

Front

What are the substances formed as a result of a chemical reaction called?

Back

The substances formed as a result of a chemical reaction are called products.

Front

What is a pure substance?

Back

A pure substance is a material with a constant composition, meaning it has uniform properties throughout.

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle found in atoms.

Front

What is the atomic number of an element?

Back

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

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting materials in a chemical reaction that undergo change to form products.