Atomic Structure (AQA GCSE Physics): Flashcards
📚Flashcards
Practise the cards
15 cards from this deck
ShowHide
Practise the cards
15 cards from this deck
What does the nucleus contain?
What does the nucleus contain?
Protons and neutrons
Relative charge of proton
Relative charge of proton
+1
Relative charge of neutron
Relative charge of neutron
0
Relative charge of electron
Relative charge of electron
-1
Typical atom radius
Typical atom radius
m
How much smaller is nucleus vs atom?
How much smaller is nucleus vs atom?
10,000 times smaller
Where is most atomic mass located?
Where is most atomic mass located?
In the nucleus
Describe Thomson's Plum Pudding Model
Describe Thomson's Plum Pudding Model
Ball of +ve charge with -ve electrons embedded
Rutherford: Most alphas passed through → conclusion
Rutherford: Most alphas passed through → conclusion
Atom is mostly empty space
Rutherford: Some alphas bounced back → conclusion
Rutherford: Some alphas bounced back → conclusion
Mass concentrated in centre
What did Bohr call electron orbits?
What did Bohr call electron orbits?
Energy levels or shells
James Chadwick's discovery
James Chadwick's discovery
The neutron
What is atomic number?
What is atomic number?
Number of protons and electrons
What is atomic mass?
What is atomic mass?
Protons + neutrons
Atom absorbs EM radiation, electron does what?
Atom absorbs EM radiation, electron does what?
Moves to higher energy level