Chemistry 1 - Answers

Published: Sunday 24th July 2016
  1. Of which element is Ozone an naturally occurring form? Oxygen.
  2. Which gas is manufactured industrially using the Haber-Bosch process? Ammonia.
  3. By what name is Group 17 in the Periodic Table also known? The Halogens.
  4. In which country is the village of Ytterby, after which four elements are named? Sweden.
  5. Which is the most abundant element in our universe? Hydrogen.
  6. What was the first new element discovered by Marie Curie? Polonium.
  7. By what name is the centre of an atom known? Nucleus.
  8. Which element has the chemical symbol K? Potassium.
  9. What name is given to atoms of the same element that have a different atomic mass? Isotopes.
  10. Which element was know as "Brimstone"? Sulphur.
  11. Named after the Greek for "Carrying Light", which element has the Atomic Number 15? Phosphorus.
  12. What is the hardest form of the element Carbon? Diamond.
  13. Which chemical substances have a pH of less than seven? Acids.
  14. Which element is often referred to as "Quicksilver"? Mercury.
  15. Which chemical element has the symbol Cr? Chromium.
  16. Which is the Earth's most abundant metal? Aluminium.
  17. The atomic number of an element is equal to the number of which particles in an atom? Protons.
  18. Who is credited with the first Periodic Table of Elements? Mendeleev.
  19. What are the products of a reaction between an acid and a base? A salt and water.
  20. Which element has a name meaning "The Sun" in Greek? Helium.


  1. G Kainyek says:

    Q17, electrons is also correct.

  2. Al says:

    Halogens are group 7 Ken, not 17,

  3. mmc says:

    For Q17, protons is the correct answer, because the number of electrons can change.

    …and in the official IUPAC system of numbering groups of the Periodic Table the halogens are group 17. The system where they are classed as being group 7 is also accepted.

  4. David Savage says:

    The correct answer to Q16 depends on whether one is refering to the WHOLE earth or just the crust. The core ( Iron rich) , the mantle (magnesium rich ), and the continental crust ( aluminium rich) present very discrete and different compositions.

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