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Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which...

Chemistry
JAMB 2001

Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which of these elements is a metal?

  • A. X
  • B. W
  • C. Z
  • D. Y
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Correct Answer: Option C
Explanation

Element Z has electronic configuration of  2, 8, 8, 2. This implies it's in group 2 (Alkaline earth metals). Actually, the element is most likely to be Calcium with an atomic number of 20. The correct answer is option C

There is an explanation video available below.

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Explanation Video

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