BYJUS Chemistry Quiz: Electron Distribution in Orbits

According to Hund's Rule, what must happen if there are two or more degenerate orbitals available?

• Electrons can enter the orbitals in any random order

• Two electrons must enter each one until they are all full before pairing up

• One electron must enter each one until they are all half full before pairing up

• One electron must enter each one and then pair up with another electron

What does the Pauli exclusion principle state?

• No two electrons in a single atom will have the same set of quantum numbers

• Two electrons in a single atom will always have the same set of quantum numbers

• Electrons in a single atom can have the same set of quantum numbers if they have opposite spins

• Electrons in a single atom can have the same set of quantum numbers if they have the same spins

According to the Aufbau principle, in what sequence are electrons placed into atomic orbitals?

• In ascending sequence of orbital energy

• In descending sequence of orbital energy

• In any random sequence

• In the sequence of the periodic table

What is the maximum stability possessed by every partially filled electron in an orbital of a subshell according to Hund's Rule?

• Because every partially filled electron in an orbital of a subshell has the same spin

• Because every partially filled electron in an orbital of a subshell has opposite spins

• Because every partially filled electron in an orbital of a subshell has the same energy

• Because every partially filled electron in an orbital of a subshell has opposite energies

What is the requirement for the two electrons in the same orbital according to the Pauli exclusion principle?

• They must have opposite energy levels

• They must have opposing spins or be in an antiparallel configuration

• They must have the same energy level

• They must have the same spin or be in a parallel configuration

What determines the lone pair of electrons in an atom and the valency according to Hund's Rule?

• Pauli exclusion principle

• Aufbau principle

• Hund's Rule

• Quantum numbers

What is the sequence of energy levels according to the Aufbau principle?

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 4f, 5d, 6p, 7s, and so on and so on

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 4f, 5d, 6p, 7s, and so on and so forth

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 4f, 5d, 6p, 7s, and so forth

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 4f, 5d, 6p, 7s, and so on

What is explained by the Pauli exclusion principle?

• The structure of atoms' electron shells and how they don't pair up electrons

• The structure of atoms' electron shells and how they share electrons

• The structure of atoms' electron shells and how they don't share electrons

• The structure of atoms' electron shells and how they pair up electrons

What is the requirement for the electrons in a single atom according to the Pauli exclusion principle?

• Each electron should have or exist in the same state

• Each electron should have or exist in a paired state

• Each electron should have or exist in its own unique state (singlet state)

• Each electron should have or exist in a random state

What is the requirement for the electrons in a single atom according to the Pauli exclusion principle?

• Each electron should have or exist in its own unique state (singlet state)

• Each electron should have or exist in the same state

• Each electron should have or exist in a random state

• Each electron should have or exist in a paired state