Benchmark #1 Review

Which statement best describes the part of the atom that is shown by the arrow?

• It is an electron, and it has a negative charge.
• It is an electron,and it has a positive charge.
• It is a proton, and has a negative charge.
• It is a proton, and it has a positive charge.

Silver (Ag) has 47 protons in each atom.  Based on this information, which of the following also describes an atom of silver?

• It has no neutrons
• It has 47 electrons
• It has 23 neutrons and 24 electrons
• It has a total of 94 neutrons and electrons.

Which of the following subatomic particles can be found inside the nucleus of an atom?

• Electrons only
• Neutrons only
• Protons and neutrons 
• Protons, neutrons, and electrons

Which of the following atoms has six valence electrons?

• Magnesium (Mg)
• Silicon (Si)
• Sulfur (S)
• Argon (Ar)

An atom with the following atomic diagram has chemical properties that are most similar to ...

• Nitrogen
• Carbon
• Neon
• Calcium

A car travels from A to B at a constant 100 km/hr.  Which of the following changes?

• speed
• velocity
• frame of reference
• speed and velocity

The graph relates distance to time for a rolling ball. What is the average speed of the ball?

• 2 m/s
• 6 m/s
• 8 m/s
• 72 m/s

This diagram represents a balloon that is moving in one direction while escaping air is moving in the opposite direction. What causes the balloon to move?

• Action-Reaction forces
• Electrical forces
• Friction
• Gravitational potential energy

Which equation expresses Newton's Second law of Force and acceleration?

• F=m x a
• F= m/a
• F=m-a
• F= m + a

The tendency of a stationary object to resist being put into motion is known as

• acceleration
• inertia
• weight
• velocity