2.1a Chemistry of Living Systems Practice for Flashcard

Front

What is a molecule?

Back

A molecule is two or more atoms chemically bonded together.

Front

What is the difference between a molecule and a compound?

Back

Molecules consist of one element, while compounds consist of two or more elements.

Front

What is the difference between an element and a compound?

Back

Elements consist of one type of atom, while compounds consist of two or more types of atoms.

Front

How many molecules are in H₂O₂?

Back

There is 1 molecule in H₂O₂.

Front

What is the maximum number of electrons that can occupy the first shell of an atom?

Back

The maximum number of electrons that can occupy the first shell is 2.

Front

What is an atom?

Back

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

Front

What is a compound?

Back

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

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 mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

What is a covalent bond?

Back

A covalent bond is a type of chemical bond where two atoms share one or more pairs of electrons.