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Question

Which of the following is representative group of elements in the periodic table?
  1. Lanthanum
  2. Argon
  3. Chromium
  4. Aluminium

A
Argon
B
Chromium
C
Aluminium
D
Lanthanum
Solution
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The elements present in s and p block elements except noble gases are known as representative elements .

A) Lanthanum is in d block
B) Argon is a noble gas
C) Chromium is a d block element
D) Aluminium is a p block element

Thus, aluminium is a representative element.

Hence, option D is correct.

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