Questions: Module Knowledge Check Question 10 Yattie Decide whether each pair of elements in the table below will form an ionic compound. If they will, write the empirical formula and name of the compound formed in the spaces provided. element #1 element #2 Forms ionic compound? empirical formula of ionic compound name of ionic compound --------------- oxygen rubidium ○yes ○ no bromine lithium ○yes ○ no oxygen magnesium ○ yes ○ no iodine oxygen ○ yes ○ no

Module Knowledge Check
Question 10
Yattie

Decide whether each pair of elements in the table below will form an ionic compound. If they will, write the empirical formula and name of the compound formed in the spaces provided.

element #1  element #2  Forms ionic compound?  empirical formula of ionic compound  name of ionic compound
---------------
oxygen  rubidium  ○yes ○ no     
bromine  lithium  ○yes ○ no     
oxygen  magnesium  ○ yes ○ no     
iodine  oxygen  ○ yes ○ no
Transcript text: Module Knowiedge Check Question 10 Yattie Decide whether each pair of elements in the table below will form an ionic compound. If they will, write the empirical formula and name of the compound formed in the spaces provided. \begin{tabular}{|c|c|c|c|c|} \hline element \#1 & element \#2 & \begin{tabular}{c} Forms ionic \\ compound? \end{tabular} & \begin{tabular}{c} empirical \\ formula of ionic \\ compound \end{tabular} & name of ionic compound \\ \hline oxygen & rubidium & ○yes $\bigcirc$ no & $\square$ & $\square$ \\ \hline bromine & lithium & ○yes $\bigcirc$ no & $\square$ & $\square$ \\ \hline oxygen & magnesium & $\bigcirc$ yes $\bigcirc$ no & $\square$ & $\square$ \\ \hline iodine & oxygen & $\bigcirc$ yes $\bigcirc$ no & $\square$ & $\square$ \\ \hline \end{tabular}
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Solution

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Solution Steps

Step 1: Determine if each pair forms an ionic compound

To determine if a pair of elements forms an ionic compound, we need to check if one element is a metal and the other is a non-metal. Ionic compounds typically form between metals and non-metals due to the transfer of electrons from the metal to the non-metal.

Step 2: Analyze each pair of elements
  1. Oxygen and Rubidium:

    • Oxygen is a non-metal.
    • Rubidium is a metal.
    • They will form an ionic compound.
  2. Bromine and Lithium:

    • Bromine is a non-metal.
    • Lithium is a metal.
    • They will form an ionic compound.
  3. Oxygen and Magnesium:

    • Oxygen is a non-metal.
    • Magnesium is a metal.
    • They will form an ionic compound.
  4. Iodine and Oxygen:

    • Both iodine and oxygen are non-metals.
    • They will not form an ionic compound.
Step 3: Write the empirical formula and name of the ionic compounds
  1. Oxygen and Rubidium:

    • Rubidium (Rb) has a +1 charge.
    • Oxygen (O) has a -2 charge.
    • The empirical formula is \( \text{Rb}_2\text{O} \).
    • The name of the compound is Rubidium Oxide.
  2. Bromine and Lithium:

    • Lithium (Li) has a +1 charge.
    • Bromine (Br) has a -1 charge.
    • The empirical formula is \( \text{LiBr} \).
    • The name of the compound is Lithium Bromide.
  3. Oxygen and Magnesium:

    • Magnesium (Mg) has a +2 charge.
    • Oxygen (O) has a -2 charge.
    • The empirical formula is \( \text{MgO} \).
    • The name of the compound is Magnesium Oxide.

Final Answer

\[ \begin{array}{|c|c|c|c|c|} \hline \text{element \#1} & \text{element \#2} & \text{Forms ionic compound?} & \text{empirical formula of ionic compound} & \text{name of ionic compound} \\ \hline \text{oxygen} & \text{rubidium} & \text{yes} & \boxed{\text{Rb}_2\text{O}} & \boxed{\text{Rubidium Oxide}} \\ \hline \text{bromine} & \text{lithium} & \text{yes} & \boxed{\text{LiBr}} & \boxed{\text{Lithium Bromide}} \\ \hline \text{oxygen} & \text{magnesium} & \text{yes} & \boxed{\text{MgO}} & \boxed{\text{Magnesium Oxide}} \\ \hline \text{iodine} & \text{oxygen} & \text{no} & \boxed{} & \boxed{} \\ \hline \end{array} \]

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