A Molecular Approach to Chemistry

The kinetic-molecular theory explains the properties of solids, liquids, and gases in terms of the energy of the particles and

• gravitational forces.
• the forces that act between the particles.
• diffusion
• mass of the particles

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NGSS.HS-PS3-2

According to the kinetic-molecular theory, particles of matter

• are in constant motion.
• have different shapes.
• have different colors.
• are always fluid

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NGSS.HS-PS3-4

The particles of a real gas

• attract and repel each other
• are involved in elastic collisions
• travel in a straight line
• do not loose energy after collisions

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NGSS.HS-PS2-1

Which of the following statements is NOT true, according to the kinetic theory?

• There is no attraction between particles of a gas.
• Only particles of matter in the gaseous state are in constant motion.
• The particles of a gas collide with each other and with other objects.
• All of the statements are true.

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NGSS.HS-PS2-1

According to the kinetic theory, collisions between molecules in a gas ____.

• are perfectly elastic
• are inelastic
• never occur
• cause a loss of total kinetic energy

Which of the following statements is part of the kinetic theory?

• The particles of a gas move independently of each other.
• The particles in a gas move rapidly.
• The particles in a gas are relatively far apart.
• All of the other answers

An ideal gas is a hypothetical gas

• not made of particles.
• that conforms to all of the assumptions of the kinetic theory.
• whose particles have zero mass.
• made of motionless particles.

What is the key element for matter to change states?

• bonds
• protons
• energy
• power

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NGSS.HS-PS1-4

NGSS.HS-PS3-4

What would cause a decrease in particle movement?

• decrease atoms
• increase in space between atoms
• decrease in temperature
• increase in mass

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NGSS.MS-PS1-4

As the temperature increases, the ______ increases.

• space between atoms
• number of electrons
• number of atoms
• number of solid atoms

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NGSS.MS-PS1-4