TG1-Initial_2024-2025

Pleas, select the correct statement

• Ca⁺ and Ca²⁺ are two isotopes of Ca

• Atoms of

  one element are different from atoms of other element

• The most abundant isotope of hydrogen is deuterium

• The mass number of a given atom is the sum of protons and electrons of that atom

The visible region of the electromagnetic spectrum includes the wavelengths corresponding to colors that range, from shorter to longer wavelengths, as follows:

• violet to red

• yellow to green

• red to violet

• blue to green

The value of the work function of a metal:

• is independent of the nature of the metal

• is characteristic of each metal

• is directly proportional to the Rydberg constant

• has units of frequency (Hz)

The probability density for a particle in a one-dimensional box of size L for the state n = 2

• has no nodes

• has two nodes

• is maximun at L/2

• is identical in the intervals [0, L/2] and [L/2, L]

Knowing that the expression for the Energy levels of an electron in a hydrogen-like atom is E_n = - hRZ²/n²

• the groud state corresponds to n = 0

• all energy values are permitted

• the ground state has an energy of E = 0 J

• the groud state corresponds to n = 1

In spherical polar coordinates

• r = [0, ∞]

  θ = [0, π]

  ϕ = [0, 2π]

• r = [0, 2π]

  θ = [0, π]

  ϕ = [0, π]

• r = [0, ∞]

  θ = [0, 2π]

  ϕ = [0, π]

• r = [0, ∞]

  θ = [0, ∞]

  ϕ = [0, π]

Choose the correct statement about the hydrogen-like atom:

• the energy of 3s orbital is lower than that of 2s orbital

• the subshell 3d has 5 degenerated orbitals

• the subshell 3p has 5 degenerated orbitals

• the subshell 3d has 3 degenerated orbitals

The Plank constant has units of:

• frecuency (Hz)

• Wavelength (m)

• Energy (J)

• Energy·time (J·s)