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positive ion - magnesium(cation) negative ion-chloride (anion)
Lithium ions have a charge of +1 and fluoride ions have a charge of -1. The formula unit for lithium fluoride is LiF, which means that the lithium and fluoride ions are present in a 1:1 ratio. So the positive and negative charges cancel each other, and the compound lithium fluoride is neutral.
The formula for magnesium oxide is MgO, showing that each formula unit of magnesium oxide contains one mole of magnesium ions. Therefore, if there is ample oxygen available, 4 moles of magnesium will form 4 moles of magnesium oxide.
+2 charge for magnesium ion
Mg(NO3)2 and Ca(NO3)2
magnesium fluoride is MgF2, Mg2+ F-
The two elements that make up this compound are magnesium and fluorine. Flourine is a halogen and magnesium is an alkaline earth metal. This makes it an ionic compound, so the name would be magnesium fluoride.
Strong Attraction
but I also need the sum of the atomic numbers for the two elements involved in the polyatomic ion to be 13.
These are the ions and their charges: Mg+2 F-1The charges have to add up to zero, so two -1 fluorine cancel out one +2 magnesium ion: Mg+2 F-1 F-1Simplify: MgF2
positive ion - magnesium(cation) negative ion-chloride (anion)
The calcium ion is larger than the magnesium ion and so the charge on it is less dense. This makes it less attracted to the fluoride ions
very tightly
Magnesium fluoride, MgF2 is held together by ionic bonding between the positively charged magnesium ion and the negatively charged fluoride ions.
Lithium ions have a charge of +1 and fluoride ions have a charge of -1. The formula unit for lithium fluoride is LiF, which means that the lithium and fluoride ions are present in a 1:1 ratio. So the positive and negative charges cancel each other, and the compound lithium fluoride is neutral.
MgCl2 (Magnesium Chloride)
Magnesium ions have a 2+ charge, while chloride ions each have 1- charge. In order to cancel out the charges to create a stable, neutral compound, the formula must be MgCl2.