Free Printable Atomic Theory

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Atomic Theory

Total questions: 10

Worksheet time: 4mins

Name

Class

Date

This model this model was the first to show a nucleus, consisting of protons and neutron. Electrons surround the nucleus but are not shown in distinct energy levels.

The "Nuclear Model" by Rutherford

The "Plum Pudding Model" of the atom by Thomson

The "Quantum Mechanical Modell" of the atom by Heisenberg

Democritus's model of the atom

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.

Democritus's model of the atom

The "Rutherford Model" of the atom

The "Plum Pudding Model" of the atom

The "Quantum Mechanical Model" of the atom

Ernest Rutherford discovered that atoms were mostly _________________.

negatively charged

positively charged

electrons

empty space.

Discovered the nucleus

Democritus

Robert Millikan

James Chadwick

Ernest Rutherford

Who named the positive center of the atom the "nucleus?"

Democritus

Dalton

Thomson

Rutherford

What can you conclude from the fact that scientists continue to update the atomic model?

New information about atoms continues to be discovered

Old information about atoms is completely useless

Scientists did not have any information about atoms until a few years ago

Scientists still have no idea what atoms look like

What is the Greek word for atoms which means “indivisible”?

Atomos

Atomi

Atomic

Atoma

Who was considered as one of the founders of the ancient atomist theory?

Aristotle

Parmenides

Empedocles

Democritus

All of the following are true about Democritus' atomic theory EXCEPT ______.

Everything is made up of atomos and the void.

Atoms vary in size and shape.

Atoms are composed of subatomic particles.

Atoms are infinite in number.

10.

The following statements are based on Dalton's Atomic Theory, except one.

Atoms of different elements have different masses and properties.

Elements are composed of extremely small particles known as atoms.

All atoms of a given element are different.

Chemical reactions are rearrangement of atoms.

100 %

Atomic Theory

Total questions: 10

Worksheet time: 4mins

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