The Atom (Edexcel GCSE Physics Combined Science): Flashcards
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15 cards from this deck
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Practise the cards
15 cards from this deck
Particles in the nucleus
Particles in the nucleus
Protons and neutrons
Relative mass and charge of a proton
Relative mass and charge of a proton
Mass: 1, Charge: +1
Relative mass and charge of a neutron
Relative mass and charge of a neutron
Mass: 1, Charge: 0
Relative mass and charge of an electron
Relative mass and charge of an electron
Mass: 0, Charge: -1
Typical radius of an atom
Typical radius of an atom
metres
Nucleus radius compared to atom
Nucleus radius compared to atom
10,000 times smaller
Where is most of the atom's mass?
Where is most of the atom's mass?
Concentrated in the nucleus
Thomson's plum pudding model
Thomson's plum pudding model
Ball of +ve charge with electrons embedded
Rutherford's alpha scattering - most particles
Rutherford's alpha scattering - most particles
Went straight through
Rutherford's conclusion about atom
Rutherford's conclusion about atom
Atom is mostly empty space
Bohr's model - electrons orbit in
Bohr's model - electrons orbit in
Energy levels or shells
James Chadwick's discovery
James Chadwick's discovery
The neutron
Overall charge of an atom
Overall charge of an atom
No overall charge
Atomic number definition
Atomic number definition
Number of protons and electrons
Absorbing EM radiation - electron effect
Absorbing EM radiation - electron effect
Moves to higher energy level