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CHEMISTRY

JAMB 2019 - Question 37

Chemistry 2019 JAMB Past Questions - Question 37: four element W X Y and Z have atomic numbers 2,6,16 and 20 respectively which of these elements is a ,etal

Choose the most appropriate option for the gap .

four element W X Y and Z have atomic numbers 2,6,16 and 20 respectively which of these elements is a ,etal

A: W

B: X

C: Y

D: Z

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Correct Answer

Explanation

W=1S26X=1S2 2S2 S2P216Y =1S2 2S2 2P6 3S2 3P6 4S220Z =1S2 2S22P6 3S2 3P6 4S2Hence 20z is he metal because it contains 2 electron in its outer shell