Atoms are made up of

An atom that gains or loses an electron is called a(n)

Atoms always have a positive charge

Adhesion is the attraction between different substances

Water molecules attract nonpolar molecules such as oil.

A substance that is composed of only one type of atom is called a(n)

All matter is composed of

Nonpolar molecules have

Due to polarity, substances that dissolve best in water contain

Sharing of electrons in the outer energy levels of two atoms

Which of the following is NOT a macromolecule?

Polysaccharides are

Long chains of amino acids are found in

All organic molecules contain which element?

The two types of nucleic acids are:

The two strands of the DNA molecule are held together by

What does DNA store?

Chemical reactions that occur in cells are called

Water molecules attract nonpolar molecules such as oil.

The negatively charged particle of an atom is called the

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