Concept explainers
Interpretation:
The subscript of the metal formed by the combination of alkaline earth metal and phosphate ion, needs to be identified.
Concept introduction:
The elements are arranged in the periodic table in an increasing
Answer to Problem 8STP
(A). 3
Explanation of Solution
The alkaline earth metals belong to group 2 of the periodic table. They have 2 valance electrons in their outermost shell thus, they can lose 2 electrons to form ions with +2 charge.
Below is the example of the given combination:
Magnesium phosphateis an inorganic compound and considered as an alkaline earth metal phosphate. Here, magnesium contains the charge +2 and the charge on phosphate ion is -3, after cross multiplication the subscript on magnesium is 3.
Thus, the subscript on the metal is 3.
And, the correct answer is option (A) 3.
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