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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

Relative Atomic Mass (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Relative Atomic Mass' from the broader topic Atomic Structure And The Periodic Table. The test is geared towards the AQA exam board style syllabus.
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Element X has isotopes 50 (abundance 40%) and 52 (abundance 60%). Which calculation gives Ar?
A chemist has 6.02 × 10^23 atoms of an element whose Ar = 63.5. What is the mass of this mole in grams?
An element has isotopes with masses 28, 29, 30 and abundances 92.2%, 4.7%, 3.1%. Which is Ar (to 2 d.p.)?
If sample A contains only isotope 14 (100%) and sample B contains natural mixture giving Ar 14.01, which statement is true?
A student finds a sample containing 0.50 mol of element Y with Ar 24.0. What mass in grams does the sample have?
Which calculation finds the percentage abundance of isotope X if Ar = 10.2 and isotopes are 10 (x%) and 11 (100-x%)?
Which is the best definition of an isotope?
The Ar of magnesium is 24.3. Which combination gives the mass of 0.250 mol of magnesium?
A sample contains 0.120 g of an element with Ar = 24.0. How many moles of atoms does the sample contain? (Ar = g per mol)
A sample contains one mole of carbon atoms. How many atoms of C-12 (12C) are in one mole of C-12?
A sample of a chloride salt is analysed and the element’s relative atomic mass is found to be non-integer. Which is the most likely explanation?