Answer
See the explanation
Work Step by Step
To predict the formula and name of the binary compounds formed from the given pairs of elements, we can use the rules for the 1A through 8A families of the periodic table.
a. Ca and N
- Calcium (Ca) is in group 2A, so it has a charge of 2+.
- Nitrogen (N) is in group 5A, so it has a charge of 3-.
- The formula of the compound is Ca3N2.
- The name of the compound is calcium nitride.
b. K and O
- Potassium (K) is in group 1A, so it has a charge of 1+.
- Oxygen (O) is in group 6A, so it has a charge of 2-.
- The formula of the compound is K2O.
- The name of the compound is potassium oxide.
c. Rb and F
- Rubidium (Rb) is in group 1A, so it has a charge of 1+.
- Fluorine (F) is in group 7A, so it has a charge of 1-.
- The formula of the compound is RbF.
- The name of the compound is rubidium fluoride.
d. Mg and S
- Magnesium (Mg) is in group 2A, so it has a charge of 2+.
- Sulfur (S) is in group 6A, so it has a charge of 2-.
- The formula of the compound is MgS.
- The name of the compound is magnesium sulfide.
e. Ba and I
- Barium (Ba) is in group 2A, so it has a charge of 2+.
- Iodine (I) is in group 7A, so it has a charge of 1-.
- The formula of the compound is BaI2.
- The name of the compound is barium iodide.
f. Al and Se
- Aluminum (Al) is in group 3A, so it has a charge of 3+.
- Selenium (Se) is in group 6A, so it has a charge of 2-.
- The formula of the compound is Al2Se3.
- The name of the compound is aluminum selenide.
g. Cs and P
- Cesium (Cs) is in group 1A, so it has a charge of 1+.
- Phosphorus (P) is in group 5A, so it has a charge of 3-.
- The formula of the compound is Cs3P.
- The name of the compound is cesium phosphide.
h. In and Br
- Indium (In) is in group 3A, so it has a charge of 3+.
- Bromine (Br) is in group 7A, so it has a charge of 1-.
- The formula of the compound is InBr3.
- The name of the compound is indium bromide.
