Atom & Electron Configuration

Fill in the blank: ________ is inside the nucleus and has a positive charge.

• Proton

• Electron

• Neutron

• Photon

Fill in the blank: ________ is inside the nucleus and has a neutral charge.

• Neutron

• Proton

• Electron

• Photon

Fill in the blank: ________ is outside of the nucleus and has a negative charge.

• Electron

• Proton

• Neutron

• Nucleus

Fill in the blank: ________ is the sum of protons and neutrons.

• Mass number

• Atomic number

• Isotope number

• Electron number

Fill in the blank: ________ is the number of protons in an atom.

• Atomic number

• Mass number

• Isotope number

• Atomic mass

Fill in the blank: ________ is an atom with the same number of protons but a different number of neutrons.

• Isotope

• Ion

• Molecule

• Element

Fill in the blank: ________ are electrons in the outermost energy level.

• Valence Electrons

• Core Electrons

• Protons

• Neutrons

Fill in the blank: ________ stated electrons are located in energy levels outside of the nucleus.

• Bohr

• Dalton

• Thomson

• Rutherford

Fill in the blank: ________ states atoms are indivisible particles that make up elements.

• Dalton

• Bohr

• Rutherford

• Thomson

Fill in the blank: ________ discovered the nucleus with the gold foil experiment.

• Rutherford

• Bohr

• Thomson

• Dalton