Atomic Structure

smallest particle of an element

• atom

• element

• compound

• neutron

Rutherford- The mass of the atom and its positively charged particles were in the nucleus, with low mass negatively charged particles surrounding it.

• bohr model

• Gold Foil Experiment

• Plum pudding model

model of the atom in which electrons move rapidly around the nucleus in paths called orbits

• Bohr Model

• Gold Foil experiment

• plum pudding model

center of an atom

• nucleus

• electron cloud

positively charged subatomic particles in the nucleus

• proton

• neutron

• electron

the particles of the nucleus that have no charge

• protons

• neutrons

• electrons

negatively charged particles located in the electron cloud

• protons

• neutrons

• electrons

equals the number of protons

• atomic number

• atomic mass

• mass number

• neutrons

the sum of the number of neutrons and protons in an atomic nucleus

• atomic number

• mass number

Atoms of the same element that have different numbers of neutrons

• average atomic mass

• isotopes

• protons

• electrons