Atoms Review

What is found inside the nucleus of an atom?

• proton

• electron

• neutron

• electron cloud

Which part of the atom has the most mass?

• proton

• neutron

• nucleus

• electron

The proton has a ___________________ charge.

What is true of electrons?

• they have a negative charge

• they are found in the electron cloud

• they cant move

• they are bigger than neutrons

The atomic number is the number of __________ in an atom.

What is the atomic number of Calcium?

• 19

• 20

• 39

• 55

What is the chemical symbol for Caesium?

• C

• Ca

• Cb

• Cs

What does this diagram show us?

• a stable atom

• a positive ion

• a negative ion

• an isotope

What are these atoms called?

• neutral atoms

• isotopes

• ions

• unstable atoms

What do we call this?

• an isotope

• a change of element

• an positive ion

• a negative ion