This is a chemical element. You can find the how many electron in a single atom by using a Periodic Table.
Some covalent compounds of magnesium include magnesium bromide (MgBr2), magnesium chloride (MgCl2), and magnesium oxide (MgO). These compounds form when magnesium atoms share electrons with other nonmetal atoms to achieve a stable electron configuration.
Electron shells are called energy levels because electrons within them have specific energy values associated with their position in the atom. The farther an electron is from the nucleus, the higher its energy level. Electrons can move between these energy levels by gaining or losing energy.
Two. One is fo feet.
Three atoms total, but only two different kinds: Hydrogen and Oxygen.
"element" is a very confusing word for what you are asking. But what I think you are asking is what part of an atom does not change with an isotope. I'll answer that question. An isotope of an atom is a variation fo the element in which the atom has a different number of neutrons. However, the number of protons can never change in a single element. So no matter how many atoms of a certain element are gathered, no matter how many different isotopes there are, they all have the exact same number of protons.
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The word bifocals has three syllables. (bi-fo-cals)
How many cylinders?
Four: Fo-re-bo-ding
You can walk fo about 2 miles
Way to many fo sure