Unit 1 Review

EMR Spectrum

100

Which type of EMR photon has the lowest energy and why?

Radio waves - longest wavelength

200

A photon has an energy of approximately 6.9 × 10⁻²² kJ. What is its frequency?

1.04 x 10¹⁵ Hz

300

T or F: Beer's Law uses visible light to determine the volume of a solution.

FALSE: It calculates concentration

400

If a metal allows for lower-energy photons to eject electrons, what must be true?

Low work function

500

A 2.9 eV photon ejects an electron from a metal with a maximum kinetic energy of 0.9 eV. What is the metal’s work function?

2.0 eV

Equations and quantum numbers

100

What is an example of a Paschen-series photon?

n=6 - n=3

n=5 - n=3

n=4 - n=3

200

A photon with a frequency of 4.57 × 10¹⁴ Hz is emitted by a hydrogen atom. Which transition produced this photon?

n=3 --> n=2

300

Which particle has the longest de Broglie wavelength when each is moving at the same velocity? 

Electron, proton, atom or molecule?

Molecule

400

Is this true for the quantum number for hydrogen?

The angular momentum quantum number, ℓ, can have any value between −1 and +1.

no - the range is 0

500

How many different combinations of the quantum numbers n, ℓ, and mℓ are possible for an electron in the n = 3 shell?

9

The Periodic table

100

An instructor presents the quantum-number set n = 4, ℓ = 2, mℓ = −3, and mₛ = +½. Whats wrong?

mℓ cannot be -3 since ℓ = 2

200

How many neutrons does an atom of C-13 have?

7 neutrons

300

On the periodic table the halogens contains which group?

7A

400

Which subshell contains the valence electrons of Arsenic, As?

4s and 4p

500

What is the difference between the Aufbau rule and Hunds rule?

Aufbau is from bottom to top and Hund is about spacing out orbitals.

Electrons

100

What is the shorthand electron configuration of Neon (Ne)?

[He] 2s² 2p⁶

200

What is the full electron configuration of Fe²⁺?

1s²2s²2p⁶3s²3p⁶3d⁶

300

What is the ground state electron configuration of Copper (Cu)?

[Ar] 4s¹ 3d¹⁰

400

Which alkaline earth metal has the lowest first ionization energy?

Radium (Rd)

500

In which element does a valence electron experience the greatest effective nuclear charge, Carbon or Chlorine?

Chlorine

Periodic Trends

100

What element in the periodic table has the largest Atomic Radius?

Francium (Fr)

200

Which species has the largest radius, I^-, Sn^4- or Xe?

Sn^4-

300

Rank these elements in order of first ionization energy (lowest-highest): O,N,F,P

P,O,N,F

400

Why does Nitrogen (N) have a higher ionization energy than Oxygen (O)?

The half filled p-subshell

500

If Lithium has an electronegativity of 1, what is the electronegativity of Boron?

2 - they go in 0.5 increments