1.5-Electrons in Atoms - 1

What is the arrangement of electrons around the nucleus of an atom called?

• Atomic number

• Sub shells

• Electronic configuration

• Orbital shape

We do electronic configuration of which of the following?

• Atomic number

• Mass number

• Isotope number

• Neutron number

Which of the following represents the principal energy levels?

• s, p, d, f

• K, L, M, N, O, P, Q

• 1, 2, 3, 4 only

• α, β, γ, δ

Which of the following are the sub shells?

• A, B, C, D

• K, L, M, N

• s, p, d, f

• X, Y, Z

In "1s", what does "1" represent?

• Sub shell

• Coefficient

• Orbital

• Electron

According to which principle do electrons occupy the orbitals of the lowest energy first?

• Hund's rule

• Dalton's theory

• Aufbau principle

• Bohr's model

According to which principle can an atomic orbital describe at most two electrons?

• Pauli exclusion principle

• Aufbau principle

• Thomson's rule

• Rutherford's theory

To occupy the same orbital, two electrons must have what kind of spins?

• Parallel

• Similar

• Opposite

• Identical

The electron spin must be:

• Random

• Same

• Paired

• Split

Spin is a property of electrons that may be thought of as:

• Circular and oval

• Clockwise and counter clockwise

• Right and left only

• Left and right