Daily Practice

GCSE Science

21st April 1993

5 questions · GCSE · 584 questions in this band

1
Atomic Structure and the Periodic Table
A sample contains 90% of an isotope with mass number 10 and 10% of an isotope with mass number 11. Calculate the relative atomic mass, to 1 decimal place.
2
Using Resources
Explain why potable water is not the same as pure water.
3
Using the Earth's Resources and Potable Water
State what is meant by sustainable development.
4
Life Cycle Assessment, Recycling and Corrosion
State one environmental benefit of recycling aluminium cans rather than making new aluminium from ore.
5
Atomic Structure and the History of the Atom
Why do isotopes of an element react in the same way?

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