SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the symbol of Helium
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H
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Hl
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Hn
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He
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Explanation:
Detailed explanation-1: -Helium is a chemical element with symbol He and atomic number 2. Classified as a noble gas, Helium is a gas at room temperature.
Detailed explanation-2: -Its official symbol is He, and its atomic number is 2, which means it has two protons in its nucleus. Helium was named after Helios – the Greek Titan of the Sun – because it was first observed when analysing sunlight during a solar eclipse in 1868.
Detailed explanation-3: -Gaseous chemical element, symbol: He, atomic number: 2 and atomic weight 4, 0026 g/mol. Helium is one of the noble gases of group O in the periodic table. It’s the second lightest element.
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