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The chemical symbol for helium is?
A. H
B. He
C. Hl
D. Hm
Correct Answer Is Option = He
Notes / Explanation
The chemical symbol for helium is He, which is the short form used to represent this element in chemistry. In chemistry, each element is given a chemical symbol, which is a short form, usually consisting of one or two letters, used to represent the element in writing and in chemical formulas. The symbol for helium is He, made up of the first two letters of its name. Helium is a very light gas, being the second lightest of all the elements, after hydrogen, and it has a number of interesting and useful properties. It is a gas that has no colour, no smell and no taste, and it is very light, though not quite as light as hydrogen. One of the most important features of helium is that it is a very unreactive gas, meaning that it does not readily combine or react with other substances, and, unlike hydrogen, it does not burn, so that it is safe in this respect. Because it is very light and yet safe, being non-flammable, helium is used to fill balloons and airships to make them rise, being a safer alternative to the flammable hydrogen for this purpose, so that the balloons that float in the air are usually filled with helium. Helium is also used for a number of other purposes, including certain scientific and industrial applications, some of which make use of its properties at very low temperatures, for helium can be made extremely cold and is used in certain applications requiring very low temperatures. Helium is found in certain natural gas deposits, from which it is obtained. It is also present in the Sun and stars, where it is formed, and indeed it was first detected in the Sun before it was found on the Earth, which is reflected in its name, connected with the Sun. The study of the elements, their symbols and their properties is a fundamental part of chemistry. For PPSC and other competitive examinations, the key points to remember are that the chemical symbol for helium is He, that a chemical symbol is a short form used to represent an element, that helium is a very light gas, the second lightest of the elements after hydrogen, that is colourless, odourless, unreactive and non-flammable, and that because it is light and yet safe, it is used to fill balloons and airships, as well as having other scientific and industrial uses.
