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Chemistry: 02 - The Atom > Discovery Of The Neutron > Flashcards

Flashcards in Discovery Of The Neutron Deck (14)
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1

Who discovered the neutron?

James Chadwick

2

What did James Chadwick discover?

The neutron

3

What experiment did Chadwick carry out?

He bombarded a sample of beryllium with alpha particles

4

Describe the apparatus used by Chadwick.
(2)

A source of alpha particles

A sample of beryllium between the source of alpha particles and a paraffin wax block

5

What did Chadwick discovered from his experiment?

HE discovered that some type of radiation consisting of particles with no charge came from the beryllium

6

Why were the particles from the beryllium difficult to detect?

Because they were neutral

7

What did Chadwick discover about the neutral particles?

He found that these neutral particles were penetrating enough to knock protons out of paraffin wax

8

What did Chadwick conclude?

He concluded that the alpha particles were knocking neutral particles out of the nucleus of the beryllium atom

9

What did Chadwick learn about neutrons from his results?

That they had about the same mass

10

What did Chadwick name the neutral particles?

Neutrons

11

Why did Chadwick call the particles neutrons?

Because they had about the same mass as the proton but were neutral

12

What was emitted from the beryllium?

Neutrons

13

What was emitted from the paraffin wax block?

Protons

14

Why did the neutron prove to be one of the most important particles ever discovered?

Neutrons are used to bring about the splitting of atoms of uranium to release nuclear energy in atomic bombs and nuclear reactors