Isotopes (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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Isotopes
Isotopes
Same element, same protons, different neutrons
What all atoms of same element have in common
What all atoms of same element have in common
Same number of protons
Neutral atoms: electrons vs protons
Neutral atoms: electrons vs protons
Same number of each
Mass number (A)
Mass number (A)
Total protons + neutrons
Proton number (Z)
Proton number (Z)
Number of protons
Activity definition
Activity definition
Rate at which unstable nuclei decay
Activity unit
Activity unit
Becquerel (Bq)
1 Bq equals
1 Bq equals
Radioactive decay
Radioactive decay
Unstable nucleus releases radiation to become stable
Count-rate definition
Count-rate definition
Number of decays recorded each second
Device to measure radioactivity
Device to measure radioactivity
Geiger-Muller tube
Nature of radioactive decay
Nature of radioactive decay
Totally random process
Ionising power
Ionising power
How easily radiation loses electrons to create positive ions
Stable isotopes per element typically
Stable isotopes per element typically
Usually only 1 or 2
Count-rate vs activity
Count-rate vs activity
Not the same