Question 1

The point at which the wavefunction is zero is known as a __ ?

Accepted Answer

A node is a point in a wavefunction where the amplitude of the wave is zero. This means that there is no probability of finding an electron at that point.

Question 2

How many orbitals are defined for the shell where n = 3?

Accepted Answer

For a given shell with principal quantum number n, the number of orbitals is given by n^2. For n = 3, the number of orbitals is 3^2 = 9.

Question 3

The d_z₂ orbital is a different shape to all the other d orbitals because it is really the combination of two orbitals, meaning there are six solutions and not five to the Schrödinger equation for n = 2.

Accepted Answer

The statement is true. The d_z₂ orbital is a combination of two orbitals, giving it a different shape than the other d orbitals and resulting in six solutions to the Schrödinger equation instead of five.

Question 4

The f⁷ configuration has particular stability due to the _______ energy

Accepted Answer

The answer of The f⁷ configuration has particular stability due...

Question 5

Which of the following concepts are required to determine the ground state electronic configuration of the nitrogen atom? Please select all that apply.

Accepted Answer

To determine the ground state electronic configuration of the nitrogen atom, we need to use the Aufbau principle (which states that electrons fill orbitals from lowest to highest energy), the Pauli exclusion principle (which states that no two electrons in an atom can have the same set of four quantum numbers), and Hund's rule (which states that electrons will fill orbitals with the same energy before pairing up). The Schrodinger equation is a fundamental equation in quantum mechanics, but it is not directly needed to determine electronic configurations.

Question 6

What is the electronic configuration of the nitride, N^3- ion? Is this ion paramagnetic?

Accepted Answer

The nitride ion, N^3-, has gained three electrons compared to a neutral nitrogen atom, resulting in a full 2p subshell (2p⁶), making it diamagnetic.

Question 7

The anion of a non metal is smaller than the corresponding neutral species.

Accepted Answer

When a non-metal gains electrons to form an anion, the added electrons increase electron-electron repulsion, causing the anion to be larger than the neutral atom.

Question 8

Use Slater's rules to determine the relative sizes of N, O and F atoms.

Accepted Answer

The answer of Use Slater's rules to determine the relative...

Question 9

Match the first ionization enthalpy with the appropriate element of the first period. -1402 kJ mol^-1

Accepted Answer

Nitrogen has the first ionization enthalpy of 1402 kJ mol^-1.

Question 10

Match the first ionization enthalpy with the appropriate element of the first period. -520 kJ mol^-1

Accepted Answer

The first ionization enthalpy of Li is 520 kJ molS1U1P1-1S1S1P0, which matches the value given in the question. The first ionization enthalpies of the other elements in the first period are: H = 1312 kJ molS1U1P1-1S0, He = 2372 kJ molS1U1P1-1S0, Be = 900 kJ molS1U1P1-1S0, B = 801 kJ molS1U1P1-1S1S0, C = 1086 kJ molS1U1P1-1S1S0, N = 1402 kJ molS1U1P1-1S1S0, O = 1314 kJ molS1U1P1-1S1S0, F = 1681 kJ molS1U1P1-1S1S0, and Ne = 2081 kJ molS1U1P1-1S1S0. None of these values match the one given in the question except for Li.

Question 11

Match the first ionization enthalpy with the appropriate element of the first period. -2081 kJ mol^-1

Accepted Answer

Neon (Ne) has a high first ionization enthalpy of 2081 kJ mol^-1 due to its stable, filled electron configuration.

Question 12

Match the first ionization enthalpy with the appropriate element of the first period. -1314 kJ mol^-1

Accepted Answer

The answer of Match the first ionization enthalpy with the...

Question 13

The ionization enthalpy of the group 1 elements _______ down the group?

Accepted Answer

The answer of The ionization enthalpy of the group 1...

Question 14

The half life or a radioactive element depends on the number of nuclei at the start.

Accepted Answer

The half life of a radioactive element is a characteristic property of the element and does not depend on the number of nuclei at the start.

Quiz 3: Atomic Structure and Properties

The point at which the wavefunction is zero is known as a __ ?

How many orbitals are defined for the shell where n = 3?

The dz2 orbital is a different shape to all the other d orbitals because it is really the combination of two orbitals, meaning there are six solutions and not five to the Schrödinger equation for n = 2.

The f7 configuration has particular stability due to the _______ energy