Question 1

A tin atom has 50 electrons. Electrons in the subshell experience the lowest effective nuclear charge.

Accepted Answer

Electrons in the outermost shell (5p) experience the lowest effective nuclear charge due to increased shielding from inner electrons.

Question 2

Each p- subshell can accommodate a maximum of _ _ electrons.

Accepted Answer

A p-subshell can hold a maximum of 6 electrons because it has 3 orbitals, each capable of holding 2 electrons.

Question 3

The elements in the period of the periodic table have a core- electron configuration that is the same as the electron configuration of neon.

Accepted Answer

The third period elements have a core-electron configuration that matches neon (Ne), as neon is the noble gas at the end of the second period. Elements in the third period start adding electrons to the 3s and 3p orbitals, building upon the electron configuration of neon.

Question 4

When the electron in a hydrogen atom moves from n = 6 to n = 2, light with a wavelength of
Nm is emitted.

Accepted Answer

The answer of When the electron in a hydrogen atom...

Question 5

Of the following, radiation has the longest wavelength and radiation has the greatest energy.
Gamma ultraviolet visible

Accepted Answer

Visible light has the longest wavelength among the given options, and gamma rays have the greatest energy.

Question 6

The energy of a photon that has a frequency of 18.21 × 10¹⁵s^-¹is _ _ J.

Accepted Answer

The answer of The energy of a photon that has...

Question 7

There are unpaired electrons in a ground state fluorine atom.

Accepted Answer

Fluorine has 9 electrons, with the electron configuration 1s2 2s2 2p5. In its ground state, the first two electrons fill the 1s and 2s subshells, leaving 7 electrons to fill the 2p subshell. The 2p subshell has 3 orbitals, each able to accommodate 2 electrons, for a total of 6 electrons. This means there is 1 unpaired electron in the 2p subshell, giving a total of 1 unpaired electron in the ground state fluorine atom.

Question 8

The n = 2 to n = 6 transition in the Bohr hydrogen atom corresponds to the of a photon with a wavelength of _ nm.

Accepted Answer

The energy of the photon emitted or absorbed during a transition can be calculated using the formula E = hc/λ, where h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon. For the n = 2 to n = 6 transition in the Bohr hydrogen atom, the photon is absorbed, so we use the absorption formula, and plug in the given values for n:

E = -(13.6 eV) [(1/6^2) - (1/2^2)]
E = 10.2 eV

Then we use this energy to solve for the wavelength:

E = hc/λ
(10.2 eV)(1.602 x 10^-19 J/eV) = (6.626 x 10^-34 J s)(2.998 x 10^8 m/s)/λ
λ = 4.11 x 10^-7 m = 411 nm

Therefore, the correct answer is C: absorption, 411.

Question 9

What is the wavelength of light (nm) that has a frequency 4.62 × 10¹⁴s^-¹?

Accepted Answer

We can use the formula: λ = c/f, where λ is the wavelength, c is the speed of light (3.00 × 10^8 m/s), and f is the frequency.
First, we need to convert the frequency from scientific notation to standard notation:
4.62 × 10^14 Hz = 462 × 10^12 Hz = 4.62 × 10^14 Hz
Now, we can plug in the values and solve for λ:
λ = c/f = (3.00 × 10^8 m/s) / (4.62 × 10^14 Hz) = 6.49 × 10^-7 m = 649 nm
Therefore, the wavelength of light is 649 nm, which corresponds to choice C.

Question 10

The second shell in the ground state of atomic argon contains electrons.

Accepted Answer

The second shell, or n=2, has a maximum number of electrons equal to 2n^2, which in the case of argon (Ar) is 2(2^2)=8. Therefore, choice C, 8 electrons, is the correct answer.

Question 11

The n = 5 to n = 3 transition in the Bohr hydrogen atom corresponds to the of a photon with a wavelength of _ nm.

Accepted Answer

The answer of The n = 5 to n =...

Question 12

The wavelength of an electron whose velocity is 1.7 × 10⁴m/s and whose mass is 9.1 × 10^-²⁸g is __________ m.

Accepted Answer

de Broglie wavelength, λ = h/p = h/mv = (6.63 × 10^-34 J s)/(9.1 × 10^-31 kg × 1.7 × 10⁴ m/s) = 4.3 × 10^-11 m

Question 13

The 4d subshell in the ground state of atomic xenon contains _ electrons.

Accepted Answer

The 4d subshell in the ground state of atomic xenon is fully filled and contains 10 electrons.

Question 14

The n = 1 shell contains p orbitals. All the other shells contain _ p orbitals.

Accepted Answer

The n = 1 shell does not contain any p orbitals, while all other shells (n ≥ 2) contain 3 p orbitals.

Question 15

The de Broglie wavelength of an electron is 8.7 × 10^-¹¹m. The mass of an electron is 9.1 × 10^-³¹kg. The velocity of this electron is _ m/s.

Accepted Answer

The de Broglie wavelength formula is λ = h / (mv), where h is Planck's constant (6.63 × 10^-34 Js). Solving for v gives v = h / (mλ). Substituting the given values, v = (6.63 × 10^-34) / (9.1 × 10^-31 × 8.7 × 10^-11) = 8.4 × 10^6 m/s.

Question 16

At what speed (m/s) must a 3.0 mg object be moving in order to have a de Broglie wavelength of 5.4 × 10^-²⁹m?

Accepted Answer

The answer of At what speed (m/s) must a 3.0...

Question 17

The total number of orbitals in a shell is given by _.

Accepted Answer

The total number of orbitals in a shell is given by n², where n is the principal quantum number.

Question 18

In which orbital does an electron in a phosphorus atom experience the greatest shielding
__________ ?

Accepted Answer

Electrons in the 3p orbital experience the greatest shielding because they are in the outermost shell and are shielded by electrons in the inner shells (1s, 2s, 2p, and 3s).

Question 19

The energy of a photon that has a wavelength of 13.2 nm is _ J.

Accepted Answer

The energy of a photon is given by E = hc/λ, where h is Planck's constant, c is the speed of light, and λ is the wavelength. Substituting the given values, we get E = (6.626 × 10^-34 J s) × (3 × 10^8 m/s) / (13.2 × 10^-9 m) = 1.51 × 10^-17 J.

Question 20

There are orbitals in the second shell.

Accepted Answer

The second electron shell can hold up to 8 electrons and has 4 orbitals: one s orbital, three p orbitals (px, py, pz).

Quiz 6: Electronic Structure of Atoms

A tin atom has 50 electrons. Electrons in the subshell experience the lowest effective nuclear charge.

Each p- subshell can accommodate a maximum of _ _ electrons.

The elements in the period of the periodic table have a core- electron configuration that is the same as the electron configuration of neon.

When the electron in a hydrogen atom moves from n = 6 to n = 2, light with a wavelength of Nm is emitted.

Of the following, radiation has the longest wavelength and radiation has the greatest energy. Gamma ultraviolet visible

The energy of a photon that has a frequency of 18.21 × 1015 s- 1 is _ _ J.