Test # 985 [13-Mar-2019]

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Element
Element : helium
Symbol : he
Atomic no. : 2
Melting Point (deg c) : -272.2
Boiling Point (deg c) : -268.934
Discoverer : janssen (1868)      .. More >>

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Fact
People of Ancient China believed that swinging your arms could cure a headache      .. More >>