Atomic Structure

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  • Created by: samya_
  • Created on: 18-12-17 12:29
What is the relative chnage and relative mass of the 3 subatomic particles?
Proton= +1 charge 1 mass Neutron= 0 charge 1 mass Electron= -1 charge 1/1836 mass
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What does the number of electrons = ?
Number of electrons equals the number of protons thus all atoms are neutral
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What is the mass number?
Number of protons and neutrons
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What is the atomic number?
Number of protons thus number of electrons
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How do you find the number of neutrons?
Mass number - atomic number
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What do ions have?
Ions have a different number of protons and electrons
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What are isotopes?
Elements with the same number of protons but a different number of neutrons . Thus same atomic number but different mass numbers
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Similarities and Differences of Isotopes?
Isotopes are chemically identical. However there are slight variations in physical properties such as boiling point
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Explain the atom in 1803 and 1897?
1803 john Dalton described atoms as solid spheres and that different spheres made up different elements 1897 j.j Thomson discovered the electron.this showed atom wasn't solid and was made up of other particles.PLUM PUDDING MODEL
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Erebedt Rutherford 1909?
Discovered nucleus very small and pos charged. Concluded atoms was mainly empty space made up a negative cloud
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What was his gold foil experiment?
Positive alpha particles fired at thin sheet of gold. Most went thriught. Small number deflected back( they hit a small positive nucleus)
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What was Bohr experimental proof
When electrons move in between shells em radiation is absorbed or emitted
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what are nucleons and what force holds them together?
protons and neutrons held together by strong nuclear force
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Other cards in this set

Card 2

Front

What does the number of electrons = ?

Back

Number of electrons equals the number of protons thus all atoms are neutral

Card 3

Front

What is the mass number?

Back

Preview of the front of card 3

Card 4

Front

What is the atomic number?

Back

Preview of the front of card 4

Card 5

Front

How do you find the number of neutrons?

Back

Preview of the front of card 5
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