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atomic structure is theoretically consisting of a positively charged nucleus surrounded and neutralized by negatively charged electrons revolving in orbits at varying distances from the nucleus
atoms have 3 subatomic particles: electrons (negatively charged), protons (positively charged, neutrons (neutral, no charge)
atoms have an atomic number (number of protons) and an atomic mass (number of subatomic particles in the nucleus)
atoms with equal amounts of sub atomic particles (protons, neutrons, electrons) have no charge or is neutral.
atoms in which the number of neutrons differ from the amount of protons are called Isotopes
atoms with an amount of protons and electrons differ from each other are called Ions
atoms with more protons will be positive while atoms with less protons will be negative.
Democritus proposed that atoms are indivisible and indestructible particles that made up things. he called these atomos.
JJ Thomson discovered negatively charged particles through a cathode ray experiment
Ernest Rutherford discovered protons and the nucleus in his gold oil experiment.
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