Write the formula and name of the compound formed from the following ionic interactions: (a) The 2+ ion and the 1 - ion are both isoelectronic with the atoms of a chemically unreactive Period 4 element.

Ionic interactions arise from electrostatic attraction between two groups of opposite charge. These bonds are formed between positively charged (α-ammonium, ε-ammonium, guanidinium, and imidazolium) side chains and negatively charged (ionized forms of α-carboxyl, β-carboxyl, γ-carboxyl, phosphate, and sulfate) groups.

a) Krypton is a period-4 noble gas that is isoelectronic with both Sr +2 and the Br compound SrBr2.

b) The Period 3 noble gas Argon is isoelectronic with the compounds Mg+2 and MgO.

c) Zn+2 is the smallest 2+ ion with a filled d subshell, while ZnF2 is the smallest halogen compound.

d) the Li+ and F ions, which are the largest and smallest ionizable atoms in Period 2.

Question :

Write the formula and name of the compound formed from the following ionic interactions:

(a) The 2+ ion and the 1- ion are both isoelectronic with the atoms of a chemically unreactive Period 4 element.

(b) The 2+ ion and the 2- ion are both isoelectronic with the Period 3 noble gas.

(c) The 2+ ion is the smallest with a filled d subshell; the anion forms from the smallest halogen.

(d) The ions form from the largest and smallest ionizable atoms in Period 2.

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