SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are all different elements
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Oxygen
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Hydrogen
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Carbon
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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.
Detailed explanation-2: -O2 is a molecule made of two oxygen molecules. Our atmosphere is made of mostly O2, which our bodies have evolved to breathe. We breathe in O2 and cellular respiration requires it (C6H12O6+6O2→6CO2+6H2O). O is oxygen, while O2 is dioxygen.
Detailed explanation-3: -Oxygen is a chemical element with an atomic number of 8 (it has eight protons in its nucleus). Oxygen forms a chemical compound (O2) of two atoms which is a colorless gas at normal temperatures and pressures.
Detailed explanation-4: -The name comes from the Greek ‘oxy genes’, meaning acid forming. A vertical column in the periodic table.