Predicting Charges of Ions

This video tutorial explains how to predict the charges of monoatomic ions formed by main group elements. It covers aluminum, sulfur, nitrogen, and rubidium, detailing how each element forms ions by losing or gaining electrons to achieve the electron configuration of the nearest noble gas. Aluminum forms a 3+ cation, sulfur forms a 2- anion, nitrogen forms a 3- anion, and rubidium forms a 1+ cation.

What is the main focus of this video tutorial?

• Understanding molecular geometry

• Learning about covalent bonding

• Predicting the charges of monoatomic ions

• Studying the periodic table trends

How many electrons does aluminum lose to form a cation?

• 4 electrons

• 3 electrons

• 2 electrons

• 1 electron

What is the charge of the aluminum ion after losing electrons?

• 1+

• 4+

• 2+

• 3+

Which noble gas does sulfur aim to resemble when it forms an anion?

• Neon

• Xenon

• Argon

• Krypton

How many electrons does sulfur gain to form an anion?

• 4 electrons

• 3 electrons

• 2 electrons

• 1 electron

What is the charge of the sulfur ion after gaining electrons?

• 3-

• 4-

• 2-

• 1-

How many electrons does nitrogen gain to form an anion?

• 1 electron

• 2 electrons

• 3 electrons

• 4 electrons

What is the charge of the nitrogen ion after gaining electrons?

• 3-

• 2-

• 4-

• 1-

Which group is rubidium found in on the periodic table?

• Group 1

• Group 2

• Group 3

• Group 4

What is the charge of the rubidium ion after losing an electron?

• 3+

• 1+

• 4+

• 2+