The video tutorial explains how to determine electron configurations by using the atomic number from the periodic table. It provides examples with Boron, Chlorine, and Vanadium, detailing the step-by-step process of assigning electrons to orbitals. The tutorial emphasizes the importance of practice in mastering electron configurations and highlights their role in understanding chemical bonding.

What information does the atomic number of an element provide?

• Number of protons and electrons

• Number of neutrons

• Number of isotopes

• Number of valence electrons

How many electrons does Boron have?

• 9

• 7

• 5

• 3

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What is the electron configuration for Boron?

• 1s2 2s2 2p1

• 1s2 2s2 2p2

• 1s2 2s1 2p2

• 1s2 2s2 3p1

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How many electrons does Chlorine have?

• 17

• 16

• 18

• 15

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What is the electron configuration for Chlorine?

• 1s2 2s2 2p6 3s2 3p4

• 1s2 2s2 2p6 3s1 3p5

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2 3p5

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NGSS.HS-PS1-1

How many electrons does Vanadium have?

• 22

• 23

• 24

• 21

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What is the electron configuration for Vanadium?

• 1s2 2s2 2p6 3s2 3p6 4s2 3d3

• 1s2 2s2 2p6 3s2 3p6 4s2 3d2

• 1s2 2s2 2p6 3s2 3p6 4s1 3d3

• 1s2 2s2 2p6 3s2 3p6 4s2 3d4

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Which orbital comes after 3p in the electron configuration sequence?

• 3f

• 3d

• 4p

• 4s

Why is it important to understand electron configurations?

• To understand chemical bonding

• To predict atomic mass

• To calculate molecular weight

• To determine the number of neutrons

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the best way to get good at finding electron configurations?

• Reading textbooks

• Memorizing the periodic table

• Practicing problems

• Watching videos

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NGSS.HS-PS1-2