Exploring Rational Expressions: Addition and Subtraction

What is the relationship between energy levels and stability in atoms?

• Higher energy levels are less stable.

• Energy levels do not affect stability.

• Lower energy levels are less stable.

• Higher energy levels are more stable.

Which of the following is true about s orbitals?

• They are present in every energy level.

• They start from the second energy level.

• They can hold up to six electrons.

• They have a dumbbell shape.

How many p orbitals are there per energy level starting from the second energy level?

• Seven

• Five

• Three

• One

What is the shape of d orbitals?

• Spherical

• Dumbbell

• Flower-like

• Random

How many electrons can the f orbitals hold in total?

• 10

• 12

• 14

• 16

Which block on the periodic table corresponds to the d orbitals?

• d block

• p block

• s block

• f block

What is the correct orbital diagram for carbon with 6 electrons?

• 1s: ↑↓, 2s: ↑, 2p: ↑↓

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↑

• 1s: ↑↓, 2s: ↑↓, 2p: ↑

• 1s: ↑↓, 2s: ↑↓, 2p: ↑↑

According to Hund's rule, how should electrons fill orbitals?

• Pair up in the same orbital first.

• Fill empty orbitals at the same energy level first.

• Fill orbitals randomly.

• Fill the highest energy level first.

Which principle states that each orbital can hold only two electrons?

• Aufbau principle

• Bohr's model

• Hund's rule

• Pauli exclusion principle

What is the Aufbau principle?

• Electrons fill empty orbitals at the same energy level first.

• Electrons fill the highest energy level first.

• Electrons fill from low to high energy levels.

• Each orbital can hold only two electrons.