Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray metal that is an important component of many chemical compounds, including chlorophyll, the green pigment found in plants. Magnesium is the eighth most abundant element in the Earth’s crust and the third most abundant element in seawater. […]
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 H2. It is colorless, odorless, non-toxic, and highly combustible. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all
A list of chemical elements is an organized catalog of the known fundamental substances that consist of atoms defined by a specific number of protons in their nuclei. Each element represents a distinct form of matter and is arranged within the periodic table according to atomic number, electron structure, and recurring chemical properties. As of
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