Electron Configuration and PES Analysis

The video tutorial explores the concept of sub-levels in atoms, highlighting the flaws in Niels Bohr's model. It introduces photoelectron spectroscopy (PES) as a method to demonstrate the existence of sub-levels. The tutorial explains how to interpret PES graphs and provides examples using neon, boron, and calcium atoms. It also covers the calculation of ionization energy from PES data, emphasizing the relationship between peak height and electron count in sub-levels.

What is the main purpose of using photoelectron spectroscopy in atomic studies?

• To calculate the speed of electrons

• To determine the number of protons in an atom

• To identify sub-levels within energy levels of atoms

• To measure the mass of atoms

Which model of the atom is shown to have flaws by photoelectron spectroscopy?

• Quantum mechanical model

• Thomson's model

• Bohr's model

• Rutherford's model

In a PES graph, what does the height of each peak represent?

• The atomic mass of the element

• The energy level of the atom

• The number of electrons in the sub-level

• The number of protons in the atom

What is the electron configuration for neon as interpreted from its PES graph?

• 1s2 2s2 2p4

• 1s2 2s2 2p6

• 1s2 2s2 2p5

• 1s2 2s2 2p3

How many electrons are present in the 2p sub-level of boron according to its PES graph?

• 6

• 1

• 4

• 2

What is the first ionization energy per electron for boron in joules per electron?

• 1.5 x 10^-18 J

• 1.0 x 10^-18 J

• 1.3 x 10^-18 J

• 2.0 x 10^-18 J

Which sub-levels are filled in the electron configuration of calcium as seen in its PES graph?

• 1s, 2s, 2p, 3s, 3p, 4p

• 1s, 2s, 2p, 3s

• 1s, 2s, 2p, 3s, 3p

• 1s, 2s, 2p, 3s, 3p, 4s

What is the significance of the 4s sub-level in the PES graph of calcium?

• It indicates the presence of neutrons

• It shows the highest energy level filled

• It represents the core electrons

• It is the sub-level with the least electrons

How does the PES graph help in identifying elements?

• By matching electron configurations with the periodic table

• By displaying the number of protons

• By indicating the color of the element

• By showing the atomic mass

What is the electron configuration ending for calcium?

• 3s2

• 2p6

• 4s2

• 3p6