Exploring Electron Configuration and Orbitals

The video tutorial explains the concept of electron configuration, starting with the Bohr model and moving to the modern understanding of orbitals as probability density functions. It covers the 1s orbital and the probability of finding electrons in various locations around the nucleus. The tutorial discusses how electrons fill orbitals from low to high energy states, using examples of elements like helium, lithium, and carbon. It also explains the structure of p orbitals and how the periodic table helps determine electron configurations. Finally, it introduces the concept of d orbitals and their complex shapes.

What is the Bohr model of the electron?

• Electrons in fixed orbits around the nucleus

• Electrons in random positions around the nucleus

• Electrons in probability density functions called orbitals

• Electrons in a cloud around the nucleus

What does an orbital describe?

• The charge of an electron

• The exact position of an electron

• The probability of finding an electron in a given volume of space

• The speed of an electron

In the 1s orbital, where is the electron most likely to be found?

• Far from the nucleus

• Close to the nucleus

• At the edge of the atom

• In the middle of the atom

How do electrons fill orbitals according to their energy states?

• All at once

• From lowest energy state to highest

• From highest energy state to lowest

• Randomly

What happens when the 1s orbital is filled with two electrons?

• A third electron can be added to the 1s orbital

• The third electron goes to the 2s orbital

• The third electron is repelled out of the atom

• The third electron goes to the 1p orbital

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What shape do p orbitals have?

• Spherical

• Triangular

• Dumbbell-shaped

• Circular

How many ways can p orbitals be configured?

• One

• Four

• Two

• Three

What is the electron configuration of helium?

• 2p1

• 1s1

• 1s2

• 2s1

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How many electrons can the 2p orbital hold?

• Two

• Eight

• Four

• Six

What is the electron configuration for silicon?

• 1s2 2s2 2p6 3s2 3p4

• 1s2 2s2 2p6 3s2 3p2

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p4 3s2 3p2

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