Answer: Ionic Bond
Explanation: The electrostatic attraction that binds oppositely charged ions together. alloy. a mixture composed of two or more elements, at least one of which is a metal.
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We know that ionic radii trends have the elements ionic radii increasing right to left in a row and top to bottom in a group with Groups 13-18 having their respective exceptions.
That being said, since Ca2+ and Mg2+ are in the same group, we know that Mg2+ has a smaller radius that Ca2+.
So Mg2+ < Ca2+
And we know that Cl- and S2- are both two large atoms, due to them being found in group 17 and 16 respectively. Both of these atoms have a larger radius than Ca2+ due to them being an exception.
So we can write: Mg2+ < Ca2+ < Cl- and S2-
One way to know the exact figures for sure is to have a table on hand with all of the ionic radii. Using a table, we know that the actual ordering of the atoms is:
Mg2+< Ca2+ < Cl- < S2-
Therefore, Mg2+ has the smallest ionic radius.
Moles= mass divided by Molecular mass
Moles= 251.4 divided by 84
Moles=2.99
Rounded up is 3
Heat energy= mass x specific heat x change in temperature
change in temperature=47.0=10.0= 37 degrees
convert mass in G = 6.83x1000=6830g
Heat energy is hence= 6830 x 4.184 j/g/degrees x 37=1057338.64 j or 1057.33864Kj