AS Chemistry

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  • Created by: lwall
  • Created on: 22-02-14 18:35
What is mass number ?
The total number of protons and neutrons in a nucleus
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What is atomic number ?
The number of protons in the nucleus. All atoms of the same element will have the same atomic number.
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What is an isotope ?
Atoms of the same element with the same number of protons but different numbers of neutrons
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What is relative atomic mass ?
The average mass of an atom of an element on a scale where an atom of carbon-12 is 12
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What is relative isotopic mass ?
The mass of an atom of an isotope of an element on a scale where an atom of carbon-12 is 12
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How many molecules are there in one mole of ethane ?
Moles=number of particles you have/number of particles in a mole. Number of particles in a mole is 6x10[23] (Avogadro Constant)
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How do you calculate the number of mole of an element ?
Moles=mass/Mr
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What mass of NaOH needs to be dissolved in 50cm3 water to make a 2 mol-1 solution ?
Mole=concxvol
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Other cards in this set

Card 2

Front

What is atomic number ?

Back

The number of protons in the nucleus. All atoms of the same element will have the same atomic number.

Card 3

Front

What is an isotope ?

Back

Preview of the front of card 3

Card 4

Front

What is relative atomic mass ?

Back

Preview of the front of card 4

Card 5

Front

What is relative isotopic mass ?

Back

Preview of the front of card 5
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