Chemical Level of Organization

A Molecule is a. . .

• smallest unit of matter

• smallest unit of life

• group of 2 or more atoms joined by chemical bonds.

• composed of only 1 type of atom

Tags

NGSS.MS-PS1-1

ALL matter (living and nonliving) is made of

• cells

• atoms

• water

• energy

Tags

NGSS.MS-PS1-1

What is the basic unit of a chemical element?

• Atom

• Molecule

• Compound

• Mixture

Tags

NGSS.MS-PS1-1

Which of the following is a compound?

• Oxygen

• Water

• Hydrogen

• Nitrogen

Tags

NGSS.MS-PS1-1

What type of bond involves the sharing of electron pairs between atoms?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

Which of the following is an example of a chemical reaction?

• Melting of ice

• Rusting of iron

• Boiling of water

• Breaking a glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the chemical formula for table salt?

Which of the following particles has a positive charge?

• Electron

• Proton

• Neutron

• Photon

Tags

NGSS.MS-PS2-3

What is the pH of a neutral solution?

• 0

• 7

• 14

• 10

Which of the following is a noble gas?

• Oxygen

• Nitrogen

• Helium

• Hydrogen