LAP H3 Chemistry 1.1

Matter is "stuff" with which two properties?

• Mass and size

• Mass and time

• Mass and weight

• Mass and speed

A tiny piece of matter

• Stuff

• Molecule

• Particle

• Atom

The simplest unit of matter

• Molecule

• Particle

• Adam

• Atom

2 or more atoms combined

• Atom

• Molecule

• Matter

• Particle

Random motion of particles is known as

• Brown motion

• Brownian motion

• Charlie Brown motion

• Atom motion

Brownian motion of particles is caused by

• The particles go in the same direction

• The particles go where they want

• The particles are constantly hit on all sides

• The particles stop moving

What happens to the crystal particles when it is placed in water?

Bromine vapor is heavier than air. Even so, it spreads upwards, as shown in the picture. Why?

• The bromine becomes lighter than air

• The air disappears

• The air becomes brown

• The particles of bromine vapor mix with air particles

What is diffusion?

Use the idea of diffusion to explain how the smell of perfume travels across a room.