The atomic numbers of the metallic and non-metallic \( \mathrm{P} \) elements which are liquid a...

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The atomic numbers of the metallic and non-metallic
\( \mathrm{P} \)
elements which are liquid at room temperature
W
respectively are :
(1) 55,87
(2) 33,87
(3) 35,80
(4) 80,35
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