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Standard VI
Chemistry
Symbols of Elements
The question ...
Question

The question refers to the elements of the periodic table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but letters are not the usual symbols of the elements.

Which of these :
(c) is an alkali metal ?

345678910ABCDEFGH1112131415161718IJKLMNOP

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Solution

Elements of group 1 except hydrogen are called alkali metals.
  • Element A with atomic number 3 and I with atomic number 11 represent the elements lithium and sodium, respectively.
Therefore, A and I are alkali metals.

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