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P7 - Radioactivity

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Total cards: 24•Content version: v3•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

What is the nucleon number?

Back (Answer)

The number of protons and neutrons

#2
Front (Question)

What is a another name for proton number?

Back (Answer)

Atomic number

#3
Front (Question)

How can electrons move to different positions within an atom?

Back (Answer)

If they absorb photons which is energy to move around

#4
Front (Question)

Define an ion?

Back (Answer)

Charged atom or molecule

#5
Front (Question)

Define an isotope?

Back (Answer)

Same number of protons but different number of neutrons

#6
Front (Question)

Explain Plum Pudding model?

Back (Answer)

JJ Thomson discovered sub atomic particles and found the atom is a ball of positive charge with electrons dotted throughout it

#7
Front (Question)

What did the golf foil experiment represent?

Back (Answer)

Most alpha particles went through but some reflected

#8
Front (Question)

What is a scintillation?

Back (Answer)

A tiny flash of light where the electron has hit

#9
Front (Question)

Who confirmed the existence of the nucleus through an experiment?

Back (Answer)

Ernest Rutherford

#10
Front (Question)

What is radioactivity measured in?

Back (Answer)

Becquerels

#11
Front (Question)

What is 1 becquerel equal to?

Back (Answer)

1 count per second

#12
Front (Question)

Is alpha strongly ionising?

Back (Answer)

Yes

#13
Front (Question)

What is the composition of a beta radiation?

Back (Answer)

Fast moving electrons

#14
Front (Question)

Does gamma radiation have high penetrating power?

Back (Answer)

Yes

#15
Front (Question)

What is contamination?

Back (Answer)

The unwanted presence of materials containing radioactive atoms on other materials

#16
Front (Question)

Define irradiation?

Back (Answer)

When an object is exposed to ionising radiation

#17
Front (Question)

What is radioactive decay?

Back (Answer)

Where unstable nuclei can become more stable by emitting alpha particles, beta particles of gamma rays from the nucleus

#18
Front (Question)

What is the equation for alpha decay?

Back (Answer)

-4 ON TOP -2 ON BOTTOM + 4 AND 2 HELIUM

#19
Front (Question)

What is the equation for beta decay?

Back (Answer)

SAME ON TOP + 1 ON BOTTOM + 0 AND -1 ELECTRON

#20
Front (Question)

What is the equation for gamma decay?

Back (Answer)

STAYS THE SAME + 0 AND 0 GAMMA SYMBOL

#21
Front (Question)

What is the activity of a radioactive source?

Back (Answer)

The number of unstable atoms in the source that decay per second

#22
Front (Question)

Define half-life?

Back (Answer)

The time taken for half the radioactive atoms in a sample to decay, the time taken for the count rate to half its initial value

#23
Front (Question)

What is a radioactive tracer?

Back (Answer)

Used to trace the flow of a substance through an organ

#24
Front (Question)

What is a gamma camera used for?

Back (Answer)

Used to take pictures of internal organs