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WorksheetsScience 9
Total questions: 10
Worksheet time: 3mins
It is the negatively charged particle of the atom.
proton
neutron
electron
ion
He was known for his "raisin- bun" model of atom.
John Dalton
Ernest Ruterford
J.J Thomson
Niels Bohr
He coined the word "atomos" which means indivisible.
John Dalton
Erwin Schrodinger
Democritus
Niels Bohr
What was the famous experiment that proves the existence of protons in atoms?
Brownian motion experiment
Photoelectric effect
Cathode ray tube experiment
Gold- foil experiment
He discovered the presence of neutrons in the nucleus of atoms.
John Dalton
James Chadwick
Democritus
J.J Thomson
It is the principle that states that it is impossible to know the exact location and momentum an electron around the nucleus of an atom.
Hund's rule
Aufbau principle
Heisenberg's Uncertainty principle
Pauli Exclusion principle
He proposed that electrons move in fixed and quantized orbits.
John Dalton
J.J Thomson
Niels Bohr
Erwin Schrodinger
It is the lowest possible energy state of an electron.
Sleeping state
Ground state
Excited state
Active state
True or false: Schrodinger's model of an atom give the probability of finding an electron in a region around the nucleus of an atom.
True
False
According to Bohr, the 4th orbit (energy level) can contain up to ____ electrons.
2
8
18
32
