Electron Configuration and Atomic Structure

This video tutorial explains how to write electron configurations for elements, starting with basic concepts like orbitals and using hydrogen as an example. It progresses to helium and lithium, introducing the 1s and 2s orbitals. The video concludes with a brief mention of more complex orbitals like p and d, emphasizing the pattern of electron placement around the nucleus.

What is found at the center of an atom?

• Electrons

• Neutrons

• Protons

• Positively charged nucleus

What is the electron configuration for hydrogen?

• 2s1

• 1s2

• 1s1

• 2p1

How many electrons are in the 1s orbital of helium?

• Four

• Two

• One

• Three

What is the electron configuration for helium?

• 2p2

• 2s1

• 1s2

• 1s1

What is the next orbital filled after the 1s orbital in lithium?

• 3p

• 3s

• 2s

• 2p

What is the electron configuration for lithium?

• 1s2 2s1

• 1s2 2p1

• 1s2 2s2

• 1s1 2s2

Which orbital is filled after the 1s orbital?

• 2p

• 3p

• 2s

• 3s

Which of the following is a shape of an orbital?

• Sphere

• Rectangle

• Triangle

• Square

What is the general idea behind writing electron configurations?

• Placing electrons randomly

• Placing electrons in orbitals around the nucleus in a pattern

• Placing electrons in a straight line

• Placing electrons in a circular path