Electron Configuration and Strontium Concepts

This video tutorial explains how to write the electron configuration for the Sr2+ ion, starting with the configuration of neutral strontium. It covers two methods: using a chart and the orbital blocks method. The video also demonstrates how to write the condensed notation and explains the electron configuration for the Sr2+ ion, highlighting its stability due to its similarity to a noble gas configuration.

What is the atomic number of neutral strontium?

• 42

• 40

• 36

• 38

Which orbital is filled after 4s in the electron configuration chart method?

• 3p

• 4p

• 3d

• 5s

How many electrons can the 'd' orbital hold?

• 14

• 10

• 6

• 2

What is the advantage of using the periodic table method over the chart method?

• It is faster

• It shows the layout of the periodic table

• It requires less memorization

• It is more accurate

Which element is used as a reference for the condensed electron configuration of strontium?

• Xenon

• Krypton

• Radon

• Argon

What is the condensed electron configuration notation for strontium?

• [Kr] 5s2

• [Ne] 3s2

• [Xe] 6s2

• [Ar] 4s2

What happens to strontium's electrons when it forms an Sr2+ ion?

• It loses one electron

• It gains one electron

• It loses two electrons

• It gains two electrons

What is the electron configuration of Sr2+ similar to?

• A noble gas

• A halogen

• An alkali metal

• A transition metal

Why is the electron configuration of Sr2+ considered stable?

• It has a full outer shell

• It has an odd number of electrons

• It has unpaired electrons

• It has a half-filled d orbital

What is the full electron configuration of Sr2+?

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s0