Questions and Answers
According to the Aufbau principle, which of the following sublevels is lowest in energy?
The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of ____________________________.
Pauli Exclusion principle
The diagram (up down arrows) represents two electrons with ____________________________.
opposite spin states
Which of the following requires that each of the P orbitals at a particular level have one electron before any of them can have two electrons?
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Separating unpaired electrons into as many orbitals as possible ________________________________________________________.
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The ground state electron configuration of Florian is 1s(2)2s(2)2p(5). In this arrangement, how many of Neon's P orbitals are completely filled?
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What is the orbital notation for phosphorus?
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What is the correct electron configuration for a ground state atom with eight electrons?
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The electron configuration below represents a ground state atom of which element? 1s(2) 2s(2) 2p(6) 3s(2) 3p(2)
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The electron configuration of boron is 1s(2) 2s(2) 2p(1). How many electrons are present in an atom of boron?
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What is the atomic number for boron?
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Write the orbital notation for boron.
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In a ground state hydrogen atom, in which orbital is the electron?
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Oxygen has an electron configuration of 1s(2) 2s(2) 2p(4). In this arrangement, how many inner-shell electrons does oxygen have?
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In which orbital are the inner shell electrons located in an atom of magnesium that is in the ground state?
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What are the noble gases?
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The noble gas notation for the electron configuration of arsenic is 3d(10) 4s(2) 4p(3). How many unpaired electrons are there in an atom of arsenic in the ground state?
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A ground state atom of which element has one electron in its third and outermost main energy level?
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What is the correct noble gas notation for the electron configuration of an atom of sulfur?
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Study Notes
Electron Configuration and Principles
- 4s sublevel has lower energy than 3d according to the Aufbau principle.
- The Pauli Exclusion Principle states that no two electrons in the same atom can have identical four quantum numbers.
- Opposite spin states refer to two electrons represented by up and down arrows in diagrammatic form.
- Hund's Rule requires that each p orbital at a specific energy level must have one electron before any of them can accommodate a second electron.
- Separating unpaired electrons into as many orbitals as possible minimizes electron repulsion.
Electron Configurations of Elements
- The ground state electron configuration of fluorine is 1s² 2s² 2p⁵; neon's p orbitals are partially filled, with 2 completely filled.
- Phosphorus is represented by the orbital notation 1s² 2s² 2p³ 3s² 3p¹.
- The correct electron configuration for a ground state atom possessing eight electrons is 1s² 2s² 2p⁴.
- The ground state configuration of silicon is written as 1s² 2s² 2p⁶ 3s² 3p².
Specific Element Details
- Boron has an electron configuration of 1s² 2s² 2p¹, indicating a total of 5 electrons and an atomic number of 5.
- The orbital notation for boron is 1s² 2s² 2p¹.
- The ground state hydrogen atom has its electron in the 1s orbital.
- Oxygen's electron configuration is 1s² 2s² 2p⁴, with 2 inner-shell electrons present.
- The inner shell electrons of magnesium (ground state) are in the orbitals 1s² 2s² 2p⁶.
Noble Gases and Notation
- Noble gases include helium, neon, argon, krypton, xenon, and radon.
- Arsenic's noble gas notation for electron configuration is [Ar] 3d¹⁰ 4s² 4p³ indicating 3 unpaired electrons in its ground state.
- A ground state sodium atom features one electron in its third and outermost main energy level.
- Sulfur's noble gas notation for electron configuration is [Ne] 3s² 3p⁴.
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Description
Test your knowledge of key chemistry concepts from Chapter 4.3. These flashcards cover important principles such as the Aufbau principle and Pauli Exclusion principle. Challenge yourself to recall definitions and diagrams related to electron configuration.
