What Is an Atom

What is the basic particle from which all elements are made of?

The positively charged center of an atom is called the

Surrounding the nucleus in a "cloud" are electrons which are _________ charged.

Atoms have a net charge (all the protons, neutrons, and electrons). What is the net charge of atoms?

• Positive

• Neutral

• Negative

What does the atomic number tell us?

• The number of protons

• The number of electrons

• The number of neutrons

• The mass of the atom

What does the word atom (atomos) mean?

• Uncuttable

• TIny

• Spherical

• Smallest

What are the 3 subatomic particles called? TIck all the correct boxes

• Electrons

• Protons

• Neutrons

• Nucleus

Tick the correct boxes to show which subatomic particles are found in the nucleus

• Protons

• Neutrons

• Electrons

True or False the protons and neutrons give the atom most of its mass

• True

• False

Which subatomic particles have no charge (are neutral)?

• Neutrons

• Protons

• Electrons