Two elements--calcium and oxygen--are present in quick lime.
2-2.5 times.
There are A + Z nucleons in an element
The sun's main present element is hydrogen.
Manganese is an element
30
30
The chemical formula shows you this. The subscripted number next to each element shows how many atoms are present in a molecule or formula unit. If no number is shown, then only one atom of that element is present.
The chemical formula shows you this. The subscripted number next to each element shows how many atoms are present in a molecule or formula unit. If no number is shown, then only one atom of that element is present.
Limestone, calcium carbonate, is heated until it glows. It will give off carbon dioxide and change into calcium oxide. Calcium oxide is called quicklime because it hisses and swells up when a drop of water is added to it, just as if it was alive. "Quick" used to be used to indicate that something was living, so in this case it would be alive-lime, or quicklime.
1 Na and 1 Cl
The elements in ethanol are carbon, hydrogen, and oxygen.
The subscript on an element indicates how many atoms of the element are present: ex: O2 - the 2 shows there are two oxygen's present C6H12O6(sugar)- there are 6 carbon 12 hydrogen and 6 oxygen