Which statement best describes the differences in the melting temperatures (Tm) ofCaO and MgO?Tm (MgO) < Tm (CaO) : Stronger ionic forces due to greater ionic charges (chargeproduct)Tm (MgO) > Tm (CaO) : Stronger ionic forces due to smaller distance between theions (size)Tm (MgO) < Tm (CaO) : Stronger ionic forces due to smaller distance between theions (size)Tm (MgO) > Tm (CaO) : Stronger ionic forces due to greater ionic charges (chargeproduct)

Tm(MgO)>Tm(CaO): Stronger ionic forces due to smaller distance between the ions (size) This is…

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Which statement best describes the differences in the melting temperatures (Tm) of CaO and MgO?

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter7: Chemical Bonding And Molecular Geometry

Section: Chapter Questions

Problem 79E: The lattice energy of LiF is 1023 kJ/mol, and the LiF distance is 201 pm. MgO crystallizes in the...

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Concept explainers

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.

Question

Which statement best describes the differences in the melting temperatures (Tm) of
CaO and MgO?
Tm (MgO) < Tm (CaO) : Stronger ionic forces due to greater ionic charges (charge
product)
Tm (MgO) > Tm (CaO) : Stronger ionic forces due to smaller distance between the
ions (size)
Tm (MgO) < Tm (CaO) : Stronger ionic forces due to smaller distance between the
ions (size)
Tm (MgO) > Tm (CaO) : Stronger ionic forces due to greater ionic charges (charge
product)

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