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Chemistry: 08 - Radioactivity > Nuclear Reactions > Flashcards

Flashcards in Nuclear Reactions Deck (11)
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1

What is a nuclear reaction?

A process that alters the composition, structure or energy of an atomic nucleus

2

Why is the emission of radioactive radiation called a nuclear reaction?

The radiation is emitted from the nuclei of unstable atoms

3

Give 4 points of information on chemical reactions
(Used to differentiate between chemical and nuclear reactions)

Involves electrons rather than nucleus
No new element is formed
No release of nuclear radiation
Chemical bonds broken and formed

4

Give 4 points of information on nuclear reactions
( Used to differentiate between chemical and nuclear reactions)

Changes take place in nucleus and electrons not involved
A new element is formed
Nuclear radiation is released
No chemical bond breaking or bond formation involved

5

What is the changing of one element into another called?

Transmutation

6

What happens when an atom of radium-226 emits an alpha particle?
4 changes

Two protons and two neutrons are lost form the nucleus
The atomic number decreases by two
The mass number decreases by four
Radium-226 becomes radon-222

7

In general, what happens when an atom loses an alpha particles?
2 changes

It changes into an atom of the element two places before it in the Periodic table
The mass number decreases by four

8

What happens when an atom of carbon-14 loses a beta particle?
3 changes

The mass number stays the same
Carbon atom changes into a nitrogen atom
Atomic number increases by one

9

In general, what happens when an atom loses a beta particle?
2 changes

It changes into an atom of the element one place after it in the periodic table
The mass number stays the same

10

What happens to an atom when it emits gamma radiation?

The loss of gamma radiation does not give rise to any new atoms i.e. energy has simply been lost from the nucleus

11

In what reactions does transmutation occur?

In nuclear reactions (emission of alpha or beta particles) and not chemical reactions