Calculate the wavelength of light emitted when an electron in a hydrogen atom makes each transition [(a) or (b) and (c) or (d)] and indicate the region of the electromagnetic spectrum (infrared, visible, ultraviolet, etc.) where the light is found. a) n = 2 → n = 1; b) n = 3 → n = 1; c) n = 4 → n = 2; d) n = 5 → n = 2. (10 marks)

Explanation:

a) wavenumber = RH[1/n1^2 - 1/n2^2]

(1/x) = 109677(1/1^2 - 1/2^2)

x = wavelength = 1.2157*10^-5 cm = 1.2157*10^-7 m

b) (1/x) = 109677(1/1^2 - 1/3^2)

x = wavelength = 1.026*10^-5 cm = 1.026*10^-7 m

c)

(1/x) = 109677(1/2^2 - 1/4^2)

x = wavelength = 4.86*10^-5 cm = 4.86*10^-7 m

d)

(1/x) = 109677(1/2^2 - 1/5^2)

x = wavelength = 4.34*10^-5 cm = 4.34*10^-7 m

the answer is 303.15 or 303

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).