SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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an element
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a mixture
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a compound
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None of the above
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Detailed explanation-1: -Oxygen is a chemical element – a substance that contains only one type of atom. Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. Oxygen is a gas at room temperature and has no colour, smell or taste. Oxygen is found naturally as a molecule.
Detailed explanation-2: -Elemental oxygen (CASRN 7782-44-7) is found as a gas at standard temperatures and pressures, most commonly in the O2 form. This important element is necessary for life on this planet and is a primary component of cellular respiration.
Detailed explanation-3: -Oxygen is an element with atomic symbol O, atomic number 8, and atomic weight 16. Oxygen is an element displayed by the symbol O, and atomic number 8. It is an essential element for human survival.