Atoms and molecules

The valency of nitrogen in NH3 is

• 1

• 4

• 3

• 2

Which correctly describes the smallest amount of an element?

• Atom

• Molecule

• Compound

• Proton

How would H2O be classified? Check all that apply.

• Atom

• Molecule

• Compound

How would O2 be qualified. Check all answers that apply.

• Atom

• Molecule

• Compound

Which of the following is NOT a rule for matter?

• All matter is made of atoms

• Atoms bond to other atoms to form compounds

• Atoms are on the macro scale

• Atoms last forever

What does conservation of matter mean?

• Matter cycles through an ecosystem and 10% is lost as you move through each trophic level.

• Matter cannot be created, but can be destroyed.

• Matter cannot be created nor destroyed, and cycles through ecosystems.

• Matter and energy both move through ecosystems with 100% efficiency.

Animals take in energy as __________ and convert it to ________, the energy cells can use.

• Fat, ADP

• Fat, ATP

• Glucose, ADP

• Glucose, ATP

What is an element?

• A pure substance that cannot be broken down.

• Two atoms bonded together.

• Two or more different types of atoms bonded together.

• An molecule with an unequal distribution of charge.

What are atoms composed of?

• Protons and electrons.

• Protons, neutrons, and electrons.

• Neutrons and electrons.

• Ions, elements, and compounds.

What is matter?

• Matter has mass and takes up space.

• Matter is charged atoms.

• Matter has a charge and a mass.

• Matter is polar molecules.