Predict the ground‑state electron configuration of each ion. Use the abbreviated noble gas notation.   Cr2+:     Cu2+:       Co3+:

please answer this question correctly.   1. For a group 15/5A atom, how many electrons must it lose to be stable?

Which elements (Groups) of the periodic table provide the most unstable ions (anions)? Give the name of such elements according to the description of the periodic table.

please answer this question correctly. 1. For a group 15/5A atom, how many electrons must it loose to be stable

Consider an ionic compound, MX, composed of generic metal M and generic, gaseous halogen X. • The enthalpy of formation of MX is AH; -517 kJ/mol. • The enthalpy of sublimation of M is AH sub = 141 kJ/mol. • The ionization energy of M is IE = 449 kJ/mol. • The electron affinity of X is AHEA = -323 kJ/mol. (Refer to the hint). • The bond energy of X, is BE = 217 kJ/mol. Determine the lattice energy of MX. AHjattice kJ/mol

Consider an ionic compound, MX3, composed of generic metal M and generic gaseous halogen X. • The enthalpy of formation of MX3 is AH; = -885 kJ/mol. • The enthalpy of sublimation of M is AH sub = 121 kJ/mol. • The first, second, and third ionization energies of M are IE₁ = 649 kJ/mol, IE2 = 1635 kJ/mol, and IE3 = 2689 kJ/mol. • The electron affinity of X is AHEA = -319 kJ/mol. (Refer to the hint). • The bond energy of X₂ is BE = 191 kJ/mol. Determine the lattice energy of MX3. ΔΗ kJ/mol = lattice

Complete the ground-state electron configuration for these ions using the noble gas abbreviation and identify the charge on the ion. cadmium ion electron configuration: cadmium ion charge: thallium(III) ion electronic configuration: thallium(III) ion charge:

Use the periodic table to predict which ion will form from each main‑group element. Cs:   Br:   N:   Se:   Sr:

The total number of valence electrons in the ion [BrO3] is A

Write the empirical formula for at least four ionic compounds that could be formed from the following ions: 2+ 3+ Fe²+, MnO, CO, Fe³+ 11 0,0,... X