A combination of protons and electrons
An atom is the smallest unit of matter that retains the identity of a chemical element.
A large particle found in compounds
The force that binds subatomic particles in a molecule
Neutrons, ions, isotopes
Photons, quarks, leptons
Protons, neutrons, and electrons
Electrons, positrons, gluons
Neutron
Electron
Proton
Positron
In the electron cloud surrounding the nucleus
In the proton shell
In the neutron core
In the central nucleus
Positive charge
Negative charge
Variable charge depending on the atom
No charge; it is neutral.
The number of neutrons
The number of electrons
The number of protons in the nucleus
The total mass
The sum of electrons and protons
The sum of protons and neutrons in the nucleus
The total number of electrons
Difference between protons and electrons
Electrons
Neutrons
Positrons
Quarks
The strong nuclear force
Gravitational force
Magnetic attraction
Electrostatic force
They have different numbers of electrons but the same number of neutrons.
They differ in chemical properties.
They have the same number of protons but different numbers of neutrons.
They have identical masses but different charges.
A particle with no charge
An atom or molecule with an unequal number of protons and electrons, resulting in a charge.
A nucleus with extra neutrons
A neutral particle in the electron cloud
Albert Einstein
J.J. Thomson
Niels Bohr
James Chadwick
About 200 times more
Approximately 1836 times more massive
Roughly 500 times more
Similar to each other
Solid sphere model
Bohr model where electrons orbit the nucleus at specific distances
Thomson's plum pudding model
Quantum mechanical model
Photoelectric experiment
Oil drop experiment by Millikan
The Gold Foil Experiment conducted by Ernest Rutherford
Cathode ray experiment by Thomson