The Atom (Edexcel GCSE Physics): Flashcards
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15 cards from this deck
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Practise the cards
15 cards from this deck
What particles are in the nucleus?
What particles are in the nucleus?
Protons and neutrons
Relative charge of a proton
Relative charge of a proton
Relative charge of a neutron
Relative charge of a neutron
Relative charge of an electron
Relative charge of an electron
Typical radius of an atom
Typical radius of an atom
metres
How much smaller is nucleus than atom?
How much smaller is nucleus than atom?
10,000 times smaller
Where is most of atom's mass?
Where is most of atom's mass?
In the nucleus
Describe Thomson's plum pudding model
Describe Thomson's plum pudding model
Ball of positive charge with electrons embedded
What did Rutherford fire at gold foil?
What did Rutherford fire at gold foil?
Alpha particles
What did most alpha particles do in Rutherford's experiment?
What did most alpha particles do in Rutherford's experiment?
Went straight through
What did straight-through alpha particles show?
What did straight-through alpha particles show?
Atom is mostly empty space
What did Bohr call electron orbits?
What did Bohr call electron orbits?
Energy levels or shells
Who proved neutron exists?
Who proved neutron exists?
James Chadwick
What is atomic number?
What is atomic number?
Number of protons and electrons
What is mass number?
What is mass number?
Sum of protons and neutrons