8th grade chemistry

Front

How are elements ordered in the modern periodic table?

Back

Elements are ordered by increasing atomic number.

Front

What is a compound?

Back

A compound is a substance made up of two or more different elements that are chemically bonded together.

Front

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

Back

During a chemical reaction, the total amount of matter stays the same.

Front

Which is classified as an element?

Back

Iron is classified as an element.

Front

What classifies a substance as a mixture?

Back

A mixture is made up of two or more substances that are not chemically bonded.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element.

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.

Front

What is the atomic number?

Back

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

Front

What is a chemical reaction?

Back

A chemical reaction is a process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction.