when magnesium and oxygen react and form am ionic compound, why is there only on

Question

when magnesium and oxygen react and form am ionic compound, why is there only one oxygen atom for each magnesium atom instead of two?

which option is correct?

4 Moving to the next question prevents changes to this answer Question 1 when magnesium and oeveen react and form an ionic compound, why is there only one oxygen each magnesium atom mtead of two? atom for The formation or magnesium oxide is favored because it is an ionic compound b. Magnesium loses two electrons to become a 2 ian and anveen gains two electrons to become a 2, on C Electrons are localued between atoms A magnesium forms a Mig" ion by losing one electron. An oxygen atom can accept ane electron to farm an or ion e. A single bond between magnesium and oxygen is a polar covalent bond. t Most elements in group 2AV2 do not normally form a monoatomic ion, so there wil be ame magnesium for each orygen.

Explanation / Answer

Mg is an electro positive bivalent element. It loses two electron to form a cation with two positive charge while Oxygen (O) is an electronegative bivalent atom which accepts two electron to produce anion with two unit negative charge.

Mg (Electronic configuration: 2, 8, 2) = Mg++ (Electronic configuration: 2, 8) + 2e-

(Nobel gas configuration)

O (Electronic configuration: 2, 6) + 2e- = O-- (Electronic configuration: 2, 8)

(Nobel gas configuration)

Mg++ + O-- = MgO

So, option second is the correct one

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