Electron Configuration and Element Identification

The video tutorial explains how to determine an element from its electron configuration. It starts by counting the electrons in the configuration 1s2 2s2 2p6 3s2 3p5, which totals 17 electrons, indicating chlorine. The tutorial also shows how to use the periodic table's orbital blocks to confirm the element. The video concludes by reiterating that the electron configuration represents chlorine.

What is the main question addressed in the video?

• How to balance chemical equations

• How to identify an element from its electron configuration

• How to determine the state of matter of an element

• How to calculate molecular weight

How many electrons are present in the given electron configuration?

• 18

• 17

• 16

• 15

What does the number of electrons in a neutral element equal?

• Number of neutrons

• Number of protons

• Atomic mass

• Valence electrons

What is the atomic number of an element with 17 electrons?

• 15

• 16

• 17

• 18

Which element is represented by the electron configuration 1s2 2s2 2p6 3s2 3p5?

• Bromine

• Chlorine

• Fluorine

• Iodine

What is the maximum number of electrons that the s orbital can hold?

• 8

• 6

• 4

• 2

How many electrons can the p orbital hold?

• 8

• 2

• 4

• 6

Which orbital block does the electron configuration end in for chlorine?

• p

• s

• d

• f

What is the significance of the electron configuration ending in 3p5?

• It shows the element is a halogen

• It suggests the element is a non-metal

• It indicates the element is a noble gas

• It means the element is a metal

What element is confirmed by both methods discussed in the video?

• Oxygen

• Nitrogen

• Chlorine

• Sulfur