The energy of the electron in a hydrogen atom can be calculated from the bohr formula:
e= -ry/n^2
in this equation, ry stands for the rydberg energy, and n stands for the principal quantum number of the orbital that holds the electron.
a) calculate the wavelength of the line in the absorption line spectrum of hydrogen caused by the transition of the electron from an orbital with n=2 to an orbital with n=3 . round your answer to significant digits.

Explanation:

Using the Rydberg formula as:

where,

λ is wavelength of photon

R = Rydberg's constant (1.097 × 10⁷ m⁻¹)

n₁ is the initial final level and n₂ is the final energy level

Given that:-

= 3

= 2

Applying in the formula as:

The wavelength of the line in the absorption line spectrum of hydrogen caused by the transition of the electron from an orbital with n=2 to an orbital with n=3 is:-

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.