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Basics/Concentration
Wavelength / Frequency
Bohr's Model
Nomenclature
Electron Configuration
100

Identify the element symbol and the number of protons, neutrons, and electrons.

Charge - +1

Atomic Mass - 72

Ge

Protons - 32

Neutrons - 40

Electrons - 31

100

Describe the relationship between wavelength and frequency.

Inverse

100

Is absorption a positive or negative?

positive

100

Name this: Mg2N3

Magnesium nitride

100

Electron configuration of Sodium

1s2 2s2 2p6 3s1

200

What is the molar mass of iodine?

126.9 g/mol

200

Calculate the wavelength (in cm) of a photon with an energy of 7.45×10^−22kJ.

2.67 x 10^-5 cm

200

An electron in a hydrogen atom jumps from n=1 to n=7.
What is the energy of the photon (J)?

2.14 x 10^-18 J

200

Name this: KF

potassium fluoride

200

electron configuration of potassium

1s2 2s2 2p6 3s2 3p6 4s1

300

How many atoms are in 32.7 moles of sulfur?

1.97 x 10^25 atoms S

300

What is the frequency of a photon with an energy of 4.75×10−19J?

7.17 x 10^14 Hz

300

When an electron in a hydrogen atom falls from n=4 to n=2, what is the wavelength (nm) of the emitted photon?

486 nm

300

What is the empirical formula of calcium oxide?

CaO

300

electron configuration of bromine

1s2 2s2 2p6 3s2 3p6 4s2 3d10 3p5

400

How many molecules of sodium chloride are in a 0.5M solution of 10L?

3.011 x 10^24 NaCl molecules

400

Calculate the wavelength in nanometers of a photon with an energy of 3.28×10−19J.

605 nm

400

When an electron in a hydrogen atom falls from n=6 to n=2, what is the wavelength (nm) of the emitted photon? What color of light is this?

410 nm - violet

400

what is the empirical formula of lithium sulfide?

Li2S
400

electron configuration of O^2-

1s2 2s2 2p6

500

Toxin A has a lethal dose of 15 μg/kg, measured in mice. Its molar mass is 85,000 g·mol⁻¹. How many molecules of Toxin A would it take to kill a 0.03 kg mouse?

3.19 x 10^12 molecules

500

A solution has a molar absorptivity ε=2.10×103 1/M*cm, a concentration of 0.025 M, and a path length of 1.00 cm. What is the absorbance?

52.5

500

A photon of light with a wavelength of 410 nm, causes an electron in a Hydrogen atom to jump from the n=2 to a higher-energy orbital.

  1. Determine the final n of the electron.

  2. Indicate whether this process is absorption or emission.

n=6; absorption

500
Name this: (NH4)2SO4

ammonium sulfate

500

electron configuration of Fe^2+

1s2 2s2 2p6 3s2 3p6 4s2 3d4