Question

which image depicts the initial atoms when strontium and fluorine form an ionic compound? a. :f - sr - f: b. :f•→sr→•f: c. :f• sr •f:

Explanation:

Step1: Understand ionic - compound formation

Ionic compounds form through the transfer of electrons. Strontium (Sr) is a Group 2 element and has 2 valence electrons. Fluorine (F) is a Group 17 element and has 7 valence electrons.

Step2: Analyze electron - transfer process

Sr will lose its 2 valence electrons to achieve a stable noble - gas configuration. Each F atom needs 1 electron to achieve a stable noble - gas configuration. So, one Sr atom will transfer 1 electron to each of the two F atoms. Before the electron transfer, the atoms are separate and just have their valence electrons shown as dots in the Lewis - dot structure.

Step3: Evaluate the options

Option A shows a covalent - like structure with bonds, which is incorrect for the initial state of forming an ionic compound. Option B shows the electron - transfer arrows, but it is not the initial state. Option C shows the separate Sr and F atoms with their valence electrons, which is the initial state before the electron transfer occurs.

Answer:

C. :F• Sr •F: