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Atoms and Elements 04

Hydrogen is used in weather balloons due to being cheaper than helium. (Picture courtesy of mickdolphinone on Flickr)

Atoms and Elements 04

In Science, the periodic table contains about 118 elements so far. A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus.

Which of these options do you prefer?

  1. A pure substance in which all of the atoms are identical is a description of .......

  2. In the periodic table, the elements are arranged in order of increasing .......

  3. The elements in group 7 of the periodic table are .......

  4. The name of the element with the symbol Na is .......

  5. The name of a gas used in weather balloons is .......

  6. Which of the following is a halogen?

  7. Lithium floats on water as it .......

  8. Li, Na, K and Cs are group 1 elements. The most reactive is .......

  9. The following elements are named after countries except .......

  10. The following elements are named after famous scientists except .......

Quiz written by Sue Davison

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