Q89P - Chemistry: Molecular Nature Of Matter And Change

Question

Give the name and formula of the compound formed from the following elements

$$\begin{gathered} \mathit{a}\mathbf{.} {}_{\mathbf{37}}\mathbf{Q}\mathbf{ }\mathbf{and}\mathbf{ }{}_{\mathbf{35}}\mathbf{R} \\ \mathbf{b}\mathbf{.}\mathbf{ }\mathbf{ }\mathbf{8}\mathbf{Q}\mathbf{ }\mathbf{and}\mathbf{ }{}_{\mathbf{13}}\mathbf{R} \\ \mathbf{c}\mathbf{.}\mathbf{ }\mathbf{ }{}_{\mathbf{20}}\mathbf{Q}\mathbf{ }\mathbf{and}{\mathbf{ }}_{\mathbf{53}}\mathbf{R} \end{gathered}$$

Step-by-Step Solution

Answer

a. The name of the compound is rubidium bromine is $\mathbf{ }\mathbf{RbBr}$ 

b. The name of the compound is aluminium oxide is ${\mathbf{Al}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{3}}$ 

c. The name of the compound is calcium iodide is ${\mathbf{CaI}}_{\mathbf{2}}$

Step 1: Definition of a compound

Any substance composed of identical molecules consisting of atoms of two or more chemical elements is defined as a compound

Step 2: Explanations

a.  The element with atomic number 37 is rubidium and with atomic number 35 is bromine.

Bromine is a non-metal and rubidium is metal so, they form an ionic bond

and the compound formed is called rubidium bromide $\mathbf{ }\mathbf{RbBr}$.

The formula is  .

 

b.  The element with atomic number 8 is oxygen and the element with atomic number 13 is aluminium.Oxygen is a non-metal and aluminium is a metal they form an ionic bond

and the name of the compound formed is aluminium oxide.T

he formula is ${\mathbf{Al}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{3}}$ .

 

c.  The element with atomic number 20 is calcium and the element with atomic number 53 is iodine.Iodine is a non-metal and calcium is a metal they form an ionic bond

and the name of the compound formed is calcium iodide.

The formula is ${\mathbf{CaI}}_{\mathbf{2}}$ .