SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1
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1.008
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H
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He
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Detailed explanation-1: -H is the chemical symbol for a hydrogen atom.
Detailed explanation-2: -First element in the periodic table. In normal conditions it’s a colourless, odourless and insipid gas, formed by diatomic molecules, H2. The hydrogen atom, symbol H, is formed by a nucleus with one unit of positive charge and one electron.
Detailed explanation-3: -Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula H 2. It is colorless, odorless, tasteless, non-toxic, and highly combustible.
Detailed explanation-4: -Hydrogen is the first element in the periodic table, meaning it has an atomic number of 1 or 1 proton in each hydrogen atom. The name of the element comes from the Greek words hydro for “water” and genes for “forming, ” since hydrogen bonds with oxygen to form water (H2O).