Question 1

What is an energy level in an atom?

Accepted Answer

A fixed energy value an electron may have

Answer

The number of protons in an atom

Answer

The speed of light in a vacuum

Answer

The total mass of an atom

Question 2

What does Heisenberg’s Uncertainty Principle state?

Accepted Answer

You cannot measure position and velocity of an electron simultaneously

Answer

Electrons can be predicted with certainty

Answer

Electrons only exist when observed

Answer

An electron can exist in two places at once

Question 3

What is an orbital in the context of atomic structure?

Accepted Answer

A region of space where there's a high probability of finding an electron

Answer

An energy level of an electron

Answer

The path of an electron around the nucleus

Answer

A fixed position of an electron

Question 4

What does Dalton's Atomic Theory state about atoms?

Accepted Answer

Atoms cannot be created or destroyed

Answer

Atoms can be split into smaller parts

Answer

Atoms are larger than molecules

Answer

Atoms do not exist in nature

Question 5

Who discovered the electron?

Accepted Answer

William Crookes

Answer

Robert Millikan

Answer

Ernest Rutherford

Answer

JJ Thomson

Question 6

What did JJ Thomson determine about electrons?

Accepted Answer

They are negative particles

Answer

They are positive particles

Answer

They have no charge

Answer

They are neutral particles

Question 7

Which experiment did Robert Millikan perform?

Accepted Answer

Oil drop experiment

Answer

Alpha particle experiment

Answer

Gold foil experiment

Answer

Cathode ray experiment

Question 8

What does the Plum Pudding Model propose?

Accepted Answer

A solid positive sphere with embedded electrons

Answer

Electrons are inside protons

Answer

Electrons orbit a nucleus

Answer

Atoms are indivisible

Question 9

Who discovered the nucleus of the atom?

Accepted Answer

Ernest Rutherford

Answer

JJ Thomson

Answer

William Crookes

Answer

Robert Millikan

Question 10

Which particle was discovered by Chadwick?

Accepted Answer

Neutron

Answer

Proton

Answer

Electron

Answer

Alpha particle

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