The designations 1 A through 8 A used for certain families of the periodic table are helpful for

The designations 1 A through 8 A used for certain families...

The designations $1 \mathrm{A}$ through $8 \mathrm{A}$ used for certain families of the periodic table are helpful for predicting the charges on ions in binary ionic compounds. In these compounds, the metals generally take on a positive charge equal to the family number, while the nonmetals take on a negative charge equal to the family number minus $8 .$ Thus the compound between sodium and chlorine contains $\mathrm{Na}^{+}$ ions and $\mathrm{Cl}^{-}$ ions and has the formula NaCl. Predict the formula and the name of the binary compound formed from the following pairs of elements. a. Ca and N b. $K$ and 0 c. $\mathrm{Rb}$ and $\mathrm{F}$ d. $\mathrm{Mg}$ and $\mathrm{S}$ e. Ba and I f. Al and Se g. Cs and $P$ h. In and Br

The designations $1 \mathrm{A}$ through $8 \mathrm{A}$ used for certain families of the periodic table are helpful for predicting the charges on ions in binary ionic compounds. In these compounds, the metals generally take on a positive charge equal to the family number, while the nonmetals take on a negative charge equal to the family number minus $8 .$ Thus the compound between sodium and chlorine contains $\mathrm{Na}^{+}$ ions and $\mathrm{Cl}^{-}$ ions and has the formula NaCl. Predict the formula and the name of the binary compound formed from the following pairs of elements.
a. Ca and N
b. $K$ and 0
c. $\mathrm{Rb}$ and $\mathrm{F}$
d. $\mathrm{Mg}$ and $\mathrm{S}$
e. Ba and I
f. Al and Se
g. Cs and $P$
h. In and Br

Key Concepts

Ionic Nomenclature

The systematic naming of ionic compounds is guided by rules that reflect the nature of the ions involved. The name of an ionic compound typically starts with the cation followed by the anion, and sometimes includes information about the ion’s charge state. This nomenclature system helps in clearly communicating the composition of the compound.

Charge Neutrality

A fundamental concept in ionic compound formation is that the compound as a whole must be electrically neutral. This means the total positive charge from the metal cations must exactly cancel the total negative charge from the nonmetal anions. Calculating the correct ratio of ions requires balancing these charges.

Periodic Table Groups

This concept involves the classification of elements into groups or families based on recurring chemical properties. The groups, often designated as 1A through 8A in certain periodic table notations, help predict the behavior of elements, including their common oxidation states and chemical reactivity.

Predicting Ion Charges

Elements tend to form ions with charges that are related to their group numbers in the periodic table. Typically, metals (found in groups such as 1A, 2A, etc.) lose electrons resulting in positive charges equivalent to their group number, while nonmetals (often in groups 6A, 7A, etc.) gain electrons to form negative ions with charges reflecting their tendency to achieve a stable electron configuration.

Ionic Compound Formation

Ionic compounds are formed through the combination of positive and negative ions. The formation process is governed by the attraction between oppositely charged ions, where metals form cations and nonmetals form anions. Understanding this process is critical for determining the chemical formulas of ionic compounds.

Transcript

00:01 So in this question, predict the formula and name of the binary compound form from the following pair of elements.

00:08 So we have given some pairs that is first is calcium and nitrogen.

00:15 So some information is given in the question that the designation 1a through 8a used for certain families for the product table are helpful for predicting the charges on ions on the binary compound.

00:28 So in these compounds, the metal generally take post.

00:30 Charge and a non -metal take a negative charge so so the compound for example we can say that that the example of nacl that sodium is a metal and n a form n a positive and chlorine form cl minus so the formula is nacl so similarly for calcium and nitrogen we can see that calcium belongs to group two elements so it can form positive ca2 plus and it can form nitrogen can form nitride n3 negative so we can make a formula for this compound so this is basically ca3 and 2 so this is a formula c a 3 and 2 so the name of this compound is basically calcium nitride so this is the calcium nitride so second here that is given question that is potassium and oxygen and we know that the potassium belongs to the group one element and it can form a cum formula that is k2o so which is known as potassium oxide so which is known as potassium oxide so this is the formula makes with the potassium and oxygen k2o so next pair that is given is r b and fluorine that mean rubidium and fluorine and we know that for the rubidium it belongs to the group one element and group one element and fluorine belongs to group 17 element and rubidium is a metal and non -metal so it can form a formula that is r bf so basically this is positive negative and it can make it as r bf so.

02:38 Which is known as rubidium rubidium fluoride so rubidium fluoride and now coming to part d of the question that is magnesium and sulphur so magnesium and sulphur as we know magnesium belongs to metal and sulphur is a non -metal and it magnesium belongs to group two element and sulfur belongs to group 16 elements so it can form like mgs so the name of this is magnesium sulfide so now party of the question that is given as barium and iodine so barium and iodine so barium belongs to the group two elements and group two element and iodine group 17 elements so it can form two positive charge and it can form i minus so this is metal and non -metal so barium is metal and iodine is non -metal so it can make a formula that is b a i2 so this is known as barium iodide all right so next part that is f part is aluminium and selenium so we can see aluminium belongs to the group 13 and selenium belongs to the oxygen family that mean group 16 family so it can make a formula that is a l2 s e 3 so this is known as aluminium so this is known as aluminium selenide aluminum selenide because selenium belongs to oxygen family so it can form anion and aluminum can form cut ion so positive negative form al2s e3...

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