Chemistry Chapter 5 Quiz

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Questions and Answers

What is the frequency of red light produced by strontium salts with a wavelength of $6.50 \times 10^{-7}$ m?

$4.62 \times 10^{14}$ Hz (correct)
$4.62 \times 10^{13}$ Hz
$3.00 \times 10^{14}$ Hz
$2.31 \times 10^{14}$ Hz

Which of the following elements has the electron configuration $1s^2 2s^2 2p^6 3s^2 3p^3$?

Arsenic
Potassium
Silicon
Phosphorus (correct)

What is the abbreviated electron configuration for Silver?

[Xe] 5d^9 6s^2
[Xe] 4f^{14} 5d^{10} 6s^1
[Kr] 4d^{10} 5s^1 (correct)
[Kr] 4d^9 5s^2

How is the energy of a gamma-ray photon calculated using its frequency of $5.02 \times 10^{21}$ Hz?

<p>$E = 6.63 \times 10^{-34} \times 5.02 \times 10^{21}$ J (C)</p> Signup and view all the answers

Which principle states that no two electrons in the same atom can have the same set of four quantum numbers?

<p>Pauli Exclusion Principle (C)</p> Signup and view all the answers

Flashcards

Aufbau's Principle

The Aufbau Principle states that electrons fill orbitals starting with the lowest energy level first, and move up to higher energy levels only after all lower levels are full.

Pauli Exclusion Principle

The Pauli Exclusion Principle states that no two electrons in an atom can have the same set of four quantum numbers. In other words, an atomic orbital can hold a maximum of two electrons, and these must have opposite spins.

Hund's Rule

Hund's Rule states that electrons fill orbitals individually before pairing up in the same orbital. Also, all electrons in singly occupied orbitals have the same spin.

Wavelength and Frequency

The frequency of electromagnetic radiation is inversely proportional to its wavelength. This means that longer wavelengths correspond to lower frequencies and shorter wavelengths to higher frequencies.

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Photon Energy

The energy of a photon is directly proportional to its frequency. This means that higher frequencies correspond to more energetic photons and lower frequencies to less energetic photons.

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