Ionic Compounds and Lewis Structures

The video tutorial explains how to write the Lewis structure for strontium bromide (SrBr2). It begins by identifying strontium as a metal and bromine as a nonmetal, forming an ionic compound. The tutorial details the valence electrons of strontium and bromine, explaining how strontium transfers electrons to bromine, resulting in stable octets for bromine and a positive charge for strontium. The video concludes by illustrating the ionic bond formation and the concept of a formula unit in a crystal of strontium bromide.

What type of compound is SrBr2 considered to be?

• Covalent compound

• Ionic compound

• Metallic compound

• Molecular compound

How many valence electrons does strontium have?

• Three

• Two

• One

• Four

In which group is bromine found on the periodic table?

• Group 17

• Group 2

• Group 18

• Group 1

What happens to the electrons of strontium in the formation of SrBr2?

• They are transferred to bromine.

• They remain with strontium.

• They are shared with bromine.

• They are lost to the environment.

What charge does each bromine atom acquire after gaining an electron?

• Negative

• Neutral

• Positive

• Double negative

What is the charge of the strontium ion in SrBr2?

• Sr-

• Sr3+

• Sr2+

• Sr+

How are the valence electrons represented in the Lewis structure of SrBr2?

• As shared pairs

• As free electrons

• As transferred electrons

• As lone pairs

What is the term used to describe the repeating pattern of the Lewis structure in a crystal of SrBr2?

• Molecular unit

• Crystal lattice

• Unit cell

• Formula unit

What is the main force that holds the ions together in SrBr2?

• Covalent bond

• Hydrogen bond

• Metallic bond

• Ionic bond