Helium Element in Periodic Table | History of Helium discovery, Facts | chemistry | aurayne
Topic :-
1. Helium Element in Periodic Table
2. Helium element facts
3. helium element discovery
4. helium element history
5. properties of helium
6. What is Helium
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#Heliumelementinperiodictable
#heliumelementhistory
Helium is a chemical element whose symbol is He. Its atomic number is 2 and atomic mass is 4.002602 units.
It is a colourless, tasteless, odourless, non-toxic, inert, monoatomic gas, which is the first of the noble gas group in the periodic table. It has the lowest boiling point and melting point of all the elements.
It is the only element that cannot be solidified by sufficient cooling at normal atmospheric pressure; In order to convert it to its solid form, it is necessary to apply 25 atmospheric pressure at a temperature of 1 Kelvin.
#HeliumelementFacts - Helium is the second lightest and second most abundant element in the Universe. Hydrogen is the lightest and most abundant first. Helium is present at about 24% of the total elemental mass, which is over 12% of the combined mass of all the heavier elements.
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