Consider an ionic compound, mx, composed of generic metal m and generic, gaseous halogen x. the enthalpy of formation of mxis δh∘f=−427kj/mol. the enthalpy of sublimation of mis δhsub=135kj/mol. the ionization energy of mis ie=433kj/mol. the electron affinity of xis δhea=−307kj/mol. (refer to the hint). the bond energy of x2is be=175kj/mol. determine the lattice energy of mx.

The lattice energy of MX is -523.5 kJ/mol.

Explanation:

....[1]

....[2]

....[3]

....[4]

....[5]

....[6]

[1] = [2] + (1/2)[5] + [6] - [3] - [4]

The lattice energy of MX is -523.5 kJ/mol.

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms