Electron Configurations and Orbital Diagrams Quiz

What is the primary purpose of using a periodic table in electron configurations?

• To find the atomic mass

• To calculate the molecular weight

• To determine the number of neutrons

• To identify the number of electrons in a neutral atom

In an orbital diagram, what does an arrow represent?

• A neutron

• An electron

• A proton

• An energy level

What is the shape of the s orbital?

• Dumbbell

• Double dumbbell

• Sphere

• Tetrahedral

According to the Pauli exclusion principle, how must electrons in the same orbital spin?

• In the same direction

• They do not spin

• In opposite directions

• Randomly

What is the electron configuration of helium?

• 1s1

• 1s2

• 2s2

• 2s1

What principle explains the order in which orbitals are filled?

• Pauli exclusion principle

• Aufbau principle

• Hund's rule

• Heisenberg uncertainty principle

How is the electron configuration of lithium represented in shorthand notation?

• [Ne] 1s2

• [Ne] 2s1

• [He] 2s1

• [He] 1s2

What is the electron configuration of beryllium?

• 1s2 2s1

• 1s2 2p1

• 1s2 2s2

• 1s1 2s2

How many valence electrons does beryllium have?

• 2

• 1

• 3

• 4

What does the term 'Aufbau' mean in the context of electron configurations?

• To exclude

• To spin

• To build up

• To pair up