Electron Configuration and Aufbau Principle

The video tutorial introduces orbitals and electron configurations, focusing on the aufbau principle. It explains the electron configurations of neon, argon, calcium, and scandium, highlighting the use of noble gas notation and the order of subshell filling. The tutorial also discusses periodic table patterns, including s, p, and d blocks, and how they relate to electron configurations.

What is the origin of the term 'Aufbau' in the Aufbau principle?

• It is derived from German, meaning 'the building principle'.

• It is derived from French, meaning 'to assemble'.

• It is derived from Latin, meaning 'to build'.

• It is derived from Greek, meaning 'to construct'.

How many electrons does a neutral Neon atom have?

• 8

• 10

• 12

• 14

Which subshell is filled after the 2s subshell in Neon?

• 1s

• 3s

• 2p

• 3p

What is the electron configuration of Argon using noble gas notation?

• [Ne] 3s2 3p6

• [Ar] 4s2 4p6

• [He] 2s2 2p6

• [Ne] 3s2 3d6

In the electron configuration of Calcium, which subshell is filled after 3p?

• 4s

• 4p

• 3d

• 5s

What is the electron configuration of Scandium?

• [Ar] 4s2 3d1

• [Ar] 4p1 3d1

• [Ar] 3d2 4s1

• [Ne] 3s2 3p6

Which block in the periodic table does Scandium belong to?

• s block

• p block

• d block

• f block

What is the significance of the Aufbau principle in electron configuration?

• It explains the chemical reactivity of elements.

• It describes the shape of atomic orbitals.

• It helps in determining the order of filling subshells.

• It predicts the color of compounds.

Which elements are part of the s block in the periodic table?

• Elements in the first two columns, including Helium.

• Elements in the last two columns.

• Transition metals.

• Lanthanides and actinides.

What is the main characteristic of elements in the d block?

• They have fully filled s subshells.

• They have partially filled d subshells.

• They have fully filled p subshells.

• They have no electrons in the d subshell.