Atoms and States of Matter Review MJ3

Front

What is the smallest unit that makes up all matter?

Back

Atom

Front

Which sub-atomic particle is found inside the nucleus and has no charge?

Back

Neutron

Front

What is the atomic number of an element?

Back

The atomic number tells you the number of protons and electrons in an atom.

Front

How do particles in a solid move?

Back

They vibrate close together with a definite shape.

Front

What is a proton?

Back

A positively charged sub-atomic particle found in the nucleus of an atom.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the nucleus of an atom?

Back

The central part of an atom that contains protons and neutrons.

Front

What is the difference between a solid, liquid, and gas in terms of particle movement?

Back

Solids vibrate in place, liquids slide past each other, and gases move freely and spread out.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus by offsetting the repulsion between protons.

Front

What happens to the particles in a substance when it is heated?

Back

They gain energy and move faster, which can change the state of matter.