Atoms, Ions and Compounds - exam practice
Atoms, Ions and Compounds
Total marks:0 / 7
Question 1 of 7
1 of 7
Which statement about an atom of 23Na is correct?
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Question 2 of 7
2 of 7
What is a possible mass number of a magnesium isotope?
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Question 3 of 7
3 of 7
Which ion has a different number of electrons from the other three ions?
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Question 4 of 7
4 of 7
A sample of naturally occuring boron contains the isotopes 10B and 11B.
The relative atomic mass of the boron sample is 10.8.
What is the percentage of 11B atoms in the sample of boron?
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Question 5 of 7
5 of 7
Which atom has the smallest number of neutrons?
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Question 6 of 7
6 of 7
The mass spectrum of a sample of an element is shown above.
What is the Ar of the element?
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Question 7 of 7
7 of 7
What is the relative atomic mass, Ar, of an element with this mass spectrum?
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