Atoms & Isotopes (OCR GCSE Physics A, Combined (Gateway Science Suite)): Flashcards
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15 cards from this deck
Nucleus composition
Nucleus composition
Protons and neutrons
Proton relative charge
Proton relative charge
+1
Neutron relative charge
Neutron relative charge
0
Electron relative charge
Electron relative charge
-1
Typical atom radius
Typical atom radius
metres
How much smaller is nucleus than atom?
How much smaller is nucleus than atom?
10,000 times smaller
Where is most atomic mass located?
Where is most atomic mass located?
In the nucleus
Thomson's plum pudding model
Thomson's plum pudding model
Positive ball with electrons embedded
Rutherford's key finding
Rutherford's key finding
Atom is mostly empty space
Bohr's electron orbit idea
Bohr's electron orbit idea
Electrons orbit at specific distances (energy levels)
Chadwick's discovery
Chadwick's discovery
Neutron
What does atomic number represent?
What does atomic number represent?
Number of protons and electrons
What does mass number represent?
What does mass number represent?
Protons + neutrons
Effect of absorbing EM radiation on electron
Effect of absorbing EM radiation on electron
Moves to higher energy level
Overall charge of atoms
Overall charge of atoms
No overall charge