Answer to Question #178208 in General Chemistry for Ali Atwi

Question #178208

Application 1

The number of nucleons in magnesium is 24.


The electron configuration of magnesium is: K2 L8 M2.


1.Determine the atomic number of magnesium.


2. Magnesium loses 2 electrons to become an ion.


i, Determine the composition of magnesium ion.


ii. Write the equation of formation of magnesium ion.


iv. Classify magnesium ion according to its charge.


1
Expert's answer
2021-04-05T07:59:48-0400

1.) Atomic number of magnesium is 12.

electron configuration of magnesium is: K2 L8 M2

2+8+2 = 12

2.) composition of magnesium ion is Mg2+


Mg(s) + 2 H+ (aq) "\\to" Mg2+ (aq) + H2 (g)


magnesium atom must lose two electrons to have the same number electrons as an atom of the previous noble gas, neon. Thus, a magnesium atom will form a cation with two fewer electrons than protons and a charge of 2+. The symbol for the ion is Mg2+, and it is called a magnesium ion

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