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Chemistry: 08 - Radioactivity > Alpha Particles > Flashcards

Flashcards in Alpha Particles Deck (10)
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1

What are alpha particles made of?

Alpha particles are groups of two protons and two neutrons stuck together

2

What charge is carried by alpha particles?

Alpha particles carry a double positive charge

3

What are alpha particles emitted from?

They are emitted from the unstable nucleus of a radioactive element

4

At what speed do alpha particles travel?

They travel relatively slow

5

Why do alpha particles travel relatively slow?

As they have a relatively large mass

6

What type of penetrating power do alpha particles have?

They have a low penetrating power

7

What materials stop alpha particles from traveling?

A sheet of paper or a few centimetres of air

8

What is an example of a radioactive element that emits alpha particles?

Americum-241

9

What is americum-241?

One of the isotopes of Americum (element number 95) which is used in smoke detectors

10

In what cases are alpha particles dangerous to humans?

If alpha particles are inhaled or ingested they damage the liver, lungs and kidneys and give rise to cancer