Ch2.1 Basic Chemistry & Water

The smallest, stable subunits of matter.

• Cells

• Atoms

• Macromolecules

• Carbon

Which of the following is not one of the three main parts of an atom?

• Proton

• Neutron

• Electron

• Neutrino

Protons have a ____ charge.

• Positive

• Negative

• Neutral

Electrons have a ____ charge

• Positive

• Negative

• Neutral

Neutrons have a _______ charge.

• Positive

• Negative

• Neutral (no charge)

Which part of the atom can be shared between atoms?

• Protons

• Electrons

• Neutrons

The sharing of electrons between two atoms is called a...

• Hydrogen bond

• Adhesion

• Cohesion

• Covalent bond

How many electrons are shared in a single covalent bond? How many in a double covalent bond?

• 1;2

• 2;4

• 4;8

• The number may vary

If two atoms share electrons and are covalently bonded to one another, they are collectively known as a __________.

• Atom

• Molecule

• Proton

• Neutron

Molecules that contain carbon-hydrogen bonds (hydrocarbons) are known as _________ molecules.

• Inorganic

• Organic

• Acids

• Bases