Atomic Structure

Which of the following correctly represents the quantum numbers for an electron in a 3d orbital?

• n = 3, l = 2, m = -3, s = +1/2
• n = 3, l = 1, m = 1, s = -1/2
• n = 3, l = 2, m = 2, s = +1/2
• n = 2, l = 2, m = 0, s = +1/2

The maximum number of electrons that can occupy the 4f subshell is:

• 10
• 14
• 8
• 6

Which of the following is not a characteristic of a proton?

• It has a positive charge equal to that of an electron's negative charge.
• It has a mass approximately equal to that of a neutron.
• It is present in the nucleus of all atoms.
• It can be lost or gained by an atom during chemical reactions.

Which of the following statements is true for isotopes of an element?

• They have the same number of neutrons but different numbers of protons.
• They have the same number of protons but different numbers of neutrons.
• They have different numbers of protons and neutrons.
• They have different atomic numbers but the same atomic mass.

Which of the following orbitals will have the highest energy?

• 4s
• 3d
• 4p
• 5s

The quantum number 'l' determines the:

• Shape of the orbital
• Orientation of the orbital
• Spin of the electron
• Size of the orbital

Which element has the electron configuration [Ne]3s²3p³?

• Phosphorus
• Sulfur
• Chlorine
• Argon

In the Bohr model of the atom, which of the following transitions results in the emission of radiation with the shortest wavelength?

• n = 3 to n = 1
• n = 2 to n = 1
• n = 4 to n = 2
• n = 5 to n = 3

The effective nuclear charge felt by a 2p electron in a nitrogen atom is closest to:

• 7
• 5
• 1
• 3

Which of the following statements about the Pauli Exclusion Principle is correct?

• No two electrons in the same atom can have the same set of all four quantum numbers.
• Electrons in the same orbital must have opposite spins.
• An orbital can hold a maximum of three electrons.
• All electrons in an atom must have unique energy levels.