Podcast
Questions and Answers
Which principle dictates that electrons fill the lowest energy orbitals first?
Which principle dictates that electrons fill the lowest energy orbitals first?
- Hund's Rule
- Aufbau Principle (correct)
- Pauli Exclusion Principle
- Quantum Mechanical Model
In the electron configuration for Phosphorus, which part represents the number of valence electrons?
In the electron configuration for Phosphorus, which part represents the number of valence electrons?
- 3s23p3
- [NE]
- 3p3 (correct)
- 3s2
Which of the following statements is incorrect regarding atomic structure?
Which of the following statements is incorrect regarding atomic structure?
- Electrons have a positive charge. (correct)
- The mass number is the sum of protons and neutrons.
- An atom is the smallest unit of an element.
- Isotopes have the same atomic number.
What does the atomic number of an element signify?
What does the atomic number of an element signify?
Which of the following configurations correctly represents the abbreviated form for Lithium?
Which of the following configurations correctly represents the abbreviated form for Lithium?
Which statement correctly describes the difference between Group 2 and Group 17 elements in the periodic table?
Which statement correctly describes the difference between Group 2 and Group 17 elements in the periodic table?
In an atom, which of the following quantum numbers describes the orientation of an orbital?
In an atom, which of the following quantum numbers describes the orientation of an orbital?
What is the maximum number of electrons that can occupy a 'd' sublevel?
What is the maximum number of electrons that can occupy a 'd' sublevel?
Who is credited for developing the periodic table based on atomic numbers rather than atomic mass?
Who is credited for developing the periodic table based on atomic numbers rather than atomic mass?
Which of the following correctly describes the term 'valence electrons'?
Which of the following correctly describes the term 'valence electrons'?
Flashcards
Aufbau Principle
Aufbau Principle
The idea that electrons fill the lowest energy orbitals first. Like an apartment building, electrons fill the lower floors before moving up.
Pauli Exclusion Principle
Pauli Exclusion Principle
Only two electrons can occupy the same orbital, and they must have opposite spins. Think of them as roommates who need opposite personalities to stay together.
Hund's Rule
Hund's Rule
Equal energy orbitals are filled with one electron each before any orbital gets a second electron. Think of them as single rooms in a building.
Atomic Number
Atomic Number
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Mass Number
Mass Number
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Periodic Table Organization
Periodic Table Organization
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