6 thoughts on “Isotopes

  • January 27, 2015 at 6:52 am
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    i) they have different number of neutrons but similar number of protons and electron
    ii) ((80 x 11) + (20 x 10))/100 = 10.2

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    • February 1, 2015 at 1:57 am
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      i) should use same instead of similar
      ii) Calculation error using the calculator. Answer should be 10.8

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  • January 28, 2015 at 6:28 am
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    (i)The two forms of boron have different number of neutrons but same number of protons.
    (ii) ((80/100)x11) +((20/100)×10)= 10.8

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    • February 1, 2015 at 1:58 am
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      i) Same element with same number of protons and electrons but different number of neutrons.
      ii) Correct!

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  • January 30, 2015 at 4:35 pm
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    (i)Isotopes are the atoms of the same element but with different number of neutrons but the same number of protons.
    (ii) [ (20 x 10) + (80 x 11) ] /100 =9

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    • February 1, 2015 at 1:59 am
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      i) Great!
      ii) Calculation error using calculator. Answer should be 10.8

      Reply

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