Atomic Theory

What is atom?

• the smallest particles of matter.

• the combination of two or more atoms or elements that similar or different.

• two or more different elements chemically bonded together.

• none of the above

What is molecule?

• the smallest particles of matter.

• the basic building blocks of all matter.

• the combination of two or more atoms.

• make up everything around us.

What are the three particles of atom?

• solid, liquid and gas

• protons, neutrons and electrons

• positive, negative and no charge

• stem, roots and leaves

Which part of an atom is POSITIVELY charged?

• electrons

• neutrons

• atoms

• protons

What part of an atom is NEGATIVELY charged?

• protons

• electrons

• neutrons

• atoms

All matter is made of what____?

• atoms

• energy

• electrons

• compounds

Particles in an atom that are neutral and have no charge are called____?

• megatrons

• electrons

• neutrons

• protons

The central region of an atom where its neutrons and protons are is called___?

• nucleus

• core

• electron

• shell

When you heat matter, what happens to the atoms and molecules?

• they stop moving

• they move slower

• they move faster

• they stay the same

When you cool matter, what happens to the atoms and molecules?

• they stop moving

• they move slower

• they move faster

• they stay the same