Isotopes (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards
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What do all atoms of same element have in common?
What do all atoms of same element have in common?
Same number of protons
In neutral atoms, what equals the number of protons?
In neutral atoms, what equals the number of protons?
Number of electrons
Define isotopes
Define isotopes
Atoms of same element with same protons, different neutrons
What do isotopes have same and different?
What do isotopes have same and different?
Same no. of protons, different no. of neutrons
What does mass number () represent?
What does mass number () represent?
Number of neutrons and protons
What does represent in atomic notation?
What does represent in atomic notation?
Proton number
What's the charge if more electrons than protons?
What's the charge if more electrons than protons?
charge
Define radioactive decay
Define radioactive decay
Process where unstable nucleus gives out radiation
Why does radioactive decay occur?
Why does radioactive decay occur?
Unstable nucleus trying to become stable
Nature of radioactive decay process?
Nature of radioactive decay process?
Totally random process
Define activity of radioactive source
Define activity of radioactive source
Rate at which unstable nuclei decay
What does equal?
What does equal?
decay per second
What measures activity of radioactive source?
What measures activity of radioactive source?
Geiger-Muller tube