# Quantum Number 2: Question Preview (ID: 4180)

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**Calculate the maximum number of electrons that can occpy the levels when n = 3**

a) 4

b) 8

c) 12

d) 18

**Calculate the maximum number of electrons that can occpy the levels when n = 5**

a) 20

b) 30

c) 40

d) 50

**Calculate the maximum number of electrons that can occpy the levels when n = 10**

a) 50

b) 100

c) 150

d) 200

**Calculate the maximum number of electrons that can occpy the levels when n = 12**

a) 200

b) 244

c) 288

d) 322

**Calculate the maximum number of electrons that can occpy the levels when n = 23**

a) 512

b) 724

c) 1058

d) 1542

**A photon of UV light possesses enough energy to mutate a starnd of human DNA. what is the energy of a single UV photon and a mole of UV photons having a wavelength of 25 nm?**

a) 4.0x10^6 J/mol

b) 4.8x10^6 J/mol

c) 5.1x10^6 J/mol

d) 5.8x10^6 J/mol

**It takes 208.4 kJ of energy to remove 1 mole of electrons from an atom on the surface of rubidium metal. How much energy does it take to remove a single electron from Rb atom?**

a) 2.264x10^-19 J

b) 3.461x10^-19 J

c) 4.202x10^-19 J

d) 5.123x10^-19 J

**an FM radio station broadcasts a t99.5 MHz. Calculate the wavelength of the corresponding radio waves.**

a) 1.00 m

b) 2.01 m

c) 3.01 m

d) 4.02 m

**The laser in an audio compact disk player uses light with a wavelength of 7.80 x 10^2 nm. Calculate the frequency of this light.**

a) 3.84x10^14 s^-1

b) 4.54x10^14 s^-1

c) 5.31x10^14 s^-1

d) 6.76x10^14 s^-1

**Work function of an element is the energy required to remove an electron from surface of solid. The work function for lithium is 279.7 kJ/mol. What is the max wavelength?**

a) 427.7 nm

b) 234.2 nm

c) 676.3 nm

d) 432.2 nm

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