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Hydrogen
Atomic Number: 1
Atomic mass: 1.00798
Melting point: -259.34°c
Boiling point: -252.87°C
Electronegativity: 2.2
discoverer: henry cavendish
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Description:
Hydrogen is a very reactive gas, it is in group 1 of the periodic table, but it is slightly different than the others in group 1 since it is a non-metal element.
Atom model
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