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Name: Helium Symbol: He
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The name Helium comes
from Helios, meaning sun. Helium was first found in the sun.
Scientists found this element by means of line spectrum.
The sun
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Atomic Mass:
4.002602
Atomic Number:
2
Number of
Protons/Electrons: 2
Number of Neutrons:
2
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Melting Point:
-272.0 °C (1.15 K, -457.6 °F) Boiling Point: -268.6 °C (4.549994 K, -451.48 °F) Density: 0.1785 g/cm3
Electronegativity:
N/A (Pauling); 5.5 (Allrod Rochow)
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 Helium
is a gas. there for, it takes form of any object that it is put
into. Helium is commonly placed in balloons. |
