Isotopes (AQA GCSE Physics): Flashcards
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Isotopes definition
Isotopes definition
Same element, same number of protons, different number of neutrons
What's the same in all atoms of the same element?
What's the same in all atoms of the same element?
Same number of protons
In neutral atoms, electrons = ?
In neutral atoms, electrons = ?
Protons
What is mass number ()?
What is mass number ()?
Number of protons + neutrons
What is proton number ()?
What is proton number ()?
Number of protons
Charge when more electrons than protons
Charge when more electrons than protons
charge
Charge when fewer electrons than protons
Charge when fewer electrons than protons
charge
What is radioactive decay?
What is radioactive decay?
Unstable nucleus gives out radiation to become stable
Nature of radioactive decay process
Nature of radioactive decay process
Totally random
What is activity (radioactivity)?
What is activity (radioactivity)?
Rate at which unstable nuclei decay
Unit of activity
Unit of activity
Becquerel (Bq)
What does equal?
What does equal?
1 decay per second
Device to measure radioactive activity
Device to measure radioactive activity
Geiger-Muller tube
What is count-rate?
What is count-rate?
Number of decays recorded each second
What is ionising power?
What is ionising power?
How easily radiation causes atoms to lose electrons, creating positive ions