Electron Configuration and Atomic Structure

The video tutorial explains how to determine which element is represented by a given electron configuration. It introduces two methods: counting the electrons to match the atomic number and using the periodic table to identify the element. The example used is krypton, with an electron configuration ending in 4s2 4p6. The video also covers writing electron configurations in abbreviated notation using noble gases and discusses orbital blocks to confirm the configuration. The tutorial concludes by reiterating krypton's electron configuration.

What is the first step in identifying an element using its electron configuration?

• Counting the number of protons

• Counting the number of orbitals

• Counting the number of neutrons

• Counting the number of electrons

How can you determine the atomic number of an element from its electron configuration?

• By counting the number of orbitals

• By counting the number of valence electrons

• By counting the number of protons

• By counting the number of neutrons

Which element has an atomic number of 36?

• Argon

• Xenon

• Neon

• Krypton

What is the noble gas used to abbreviate the electron configuration of krypton?

• Helium

• Xenon

• Neon

• Argon

In abbreviated electron configuration, what does 'Ar' represent?

• The element Argon

• The element Neon

• The element Krypton

• The element Xenon

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

• 3d

• 4d

• 3p

• 4p

How many electrons can the p orbital hold?

• 4

• 8

• 2

• 6

What is the electron configuration ending for krypton?

• 4s2 4p6

• 3p6 4s2

• 4d10 5s2

• 3d10 4s2

Which of the following is a correct full electron configuration for krypton?

• 1s2 2s2 2p6 3s2 3p6 3d10 4p6

• 1s2 2s2 2p6 3s2 3p6 3d10 4s2

• 1s2 2s2 2p6 3s2 3p6 4s2 4p6

• 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6

What is the significance of the electron configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6?

• It represents the element Xenon

• It represents the element Krypton

• It represents the element Neon

• It represents the element Argon