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WorksheetsAtomic History and Forces
Total questions: 17
Worksheet time: 13mins
Which is the correct order of scientists based on their contribution to atomic structure?
Rutherford, Dalton, Thomson, Bohr
Bohr, Thomson, Rutherford, Dalton
Dalton, Bohr, Thomson, Rutherford
Dalton, Thomson, Rutherford, Bohr
Which scientist came up with the "5 atomic postulates" while working with gases?
Democritus
Bohr
Dalton
Thomson
What was JJ Thomson's major contribution to atomic structure?
He discovered neutrons
He discovered electrons
He discovered protons
He discovered quarks
What was JJ Thomson's evidence to support his claim that negative electrons exist in the atom?
The negative end of a magnet repelled the cathode ray
The positive end of a magnet repelled the cathode ray
Alpha particles were repelling the cathode ray
Alpha particles were attracting the cathode ray
Which scientist's model of the atom was the Plum Pudding Model?
Bohr
Rutherford
Dalton
Thomson
What was Rutherford's famous experiment called?
Oil Drop Experiment
Cathode Ray Tube
Gold Foil Experiment
Planetary Model Experiment
Which of the following was/were Rutherford's claim(s) based on his experiment?
There's a negative nucleus in the atom
There's a positive nucleus in the atom
Most of the atom is empty space
Most of the atom is filled with electrons
What evidence supported that the nucleus was made of positively charged particles?
Positive alpha particles were deflecting off the nucleus
Positive alpha particles were attracting to the nucleus
Negative alpha particles were deflecting off the nucleus
Negative alpha particles were attracting to the nucleus
What evidence supported the claim that the atom is mostly empty space?
Most of the alpha particles were deflected in other directions
Most of the alpha particles were passing straight through the gold foil
Most of the alpha particles were being absorbed by the gold foil
Most of the alpha particles were deflected straight back at the source
The paddle wheel moving in the Crooke's Tube when electricity passed through it supported what claim?
Protons are very light
Electrons have no mass
Electrons have mass
Neutrons have no mass
Which of the following "atomic postulate(s)" are not true today?
Matter is made of indivisible and indestructible atoms
Atoms of different elements combine to form compounds
Atoms of different elements have different weights and properties
Atoms cannot be created or destroyed
All atoms of the same element are identical
Which fundamental force involves the attractive forces between large bodies of mass?
Electromagnetism
Strong force
Gravitational force
Weak force
Which force involves positive and negative charges attracting to each other?
Electromagnetism
Strong Force
Gravitational Force
Weak Force
Which fundamental force involves protons decaying into neutrons to keep the atom stable?
Electromagnetism
Strong Force
Gravitational Force
Weak Force
Which fundamental force holds the nucleus together and overcomes the repulsion between protons?
Electromagnetism
Strong force
Gravitational force
Weak force
Which fundamental forces play the biggest role in keeping the atom together?
Electrostatic force
Strong force
Gravitational force
Weak force
Why don't electrons get "pulled into the nucleus"?
Gravitational forces overcome the electrostatic forces
Electrons are constantly moving fast outside nucleus
Strong force works in very very small distances, so it doesn't affect electrons
Electrons do get pulled into the nucleus
