oxygen is the 2nd most abundant element in the earth's crust.
oxygen is the 2nd most abundant element in the earth's crust.
what is the 2nd most abundant element in the earth's crust?
oxygen
magnesium is the ninth most abundant element in the universe. it is produced in large, aging stars from the sequential addition of three helium nuclei to a carbon nucleus. when such stars explode as supernovas, much of the magnesium is expelled into the interstellar medium where it may recycle into new star systems. magnesium is the eighth most abundant element in the earth's crust and the fourth most common element in the earth (after iron, oxygen and silicon), making up 13% of the planet's mass and a large fraction of the planet's mantle. it is the third most abundant element dissolved in seawater, after sodium and chlorine.
magnesium
sodium and potassium are very abundant in earth, both being among the ten most common elements in earth's crust; sodium makes up approximately 2.6% of the earth's crust measured by weight, making it the sixth most abundant element overall and the most abundant alkali metal. potassium makes up approximately 1.5% of the earth's crust and is the seventh most abundant element. sodium is found in many different minerals, of which the most common is ordinary salt (sodium chloride), which occurs in vast quantities dissolved in seawater. other solid deposits include halite, amphibole, cryolite, nitratine, and zeolite. many of these solid deposits occur as a result of ancient seas evaporating, which still occurs now in places such as utah's great salt lake and the dead sea. despite their near-equal abundance in earth's crust, sodium is far more common than potassium in the ocean, both because potassium's larger size makes its salts less soluble, and because potassium is bound by silicates in soil and what potassium leaches is absorbed far more readily by plant life than sodium.
alkali metal