Ion Formation and Electron Configuration

This video tutorial explains how to write electron configurations for ions, a crucial skill in chemistry. It begins by distinguishing ions from neutral atoms, highlighting the role of electron gain or loss in forming ions. The tutorial provides examples with sodium and chlorine, showing how they achieve stable noble gas configurations. Visual aids help illustrate these concepts, and practice problems with aluminum and nitrogen reinforce learning. The video emphasizes the importance of electron configurations in achieving stability.

What distinguishes an ion from a neutral atom on the periodic table?

• Ions are listed with a positive or negative superscript.

• Ions have a different number of protons.

• Ions have a different number of neutrons.

• Ions are listed in a separate section.

What happens to the electron configuration of sodium when it forms a cation?

• It gains an electron.

• It loses an electron.

• It gains a proton.

• It loses a proton.

How does chlorine achieve a stable electron configuration?

• By losing a neutron.

• By gaining a proton.

• By gaining an electron.

• By losing an electron.

What is the electron configuration of calcium cation (Ca2+)?

• It has the same configuration as krypton.

• It has the same configuration as helium.

• It has the same configuration as argon.

• It has the same configuration as neon.

What change occurs in the oxide anion's electron configuration?

• It gains a proton.

• It loses two electrons.

• It loses a proton.

• It gains two electrons.

What is the electron configuration of aluminum cation (Al3+)?

• It has the same configuration as argon.

• It has the same configuration as krypton.

• It has the same configuration as neon.

• It has the same configuration as helium.

How does the nitride anion (N3-) achieve a noble gas configuration?

• By gaining three electrons.

• By losing a neutron.

• By losing three electrons.

• By gaining a proton.

Why do atoms form ions with specific charges like 2+ or 3-?

• To become more reactive.

• To change their atomic number.

• To increase their atomic mass.

• To achieve a noble gas electron configuration.

What is the main goal of electron transfer in ion formation?

• To increase atomic size.

• To achieve stability.

• To change the element.

• To decrease atomic mass.

What happens to the electron configuration of an atom when it becomes an ion?

• It becomes identical to a non-metal.

• It becomes identical to a noble gas.

• It becomes identical to a halogen.

• It becomes identical to a metal.