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Which principle states that it is impossible to know the exact position and speed of an electron at a given time?
Heisenberg’s Uncertainty Principle
Which model show that electrons orbits the nucleus
Bohr’s Model
Who discovered the electron and thought that they were in a positive sphere?
J.J. Thompson
Who states that matter consists of tiny atoms and atoms are indestructible?
John Dalton
Who found out that electrons are fixed but always in motion through the gold foil experiment?
Ernest Rutherford
Who suggests that the nature of matter (electrons) had wave-like properties?
Louis De Brogile
For a quantum model, orbits have a 2 dimensional ring but how many does orbitals have?
a 3-dimensional space
While electrons are fixed from the nucleus in orbits where are electrons in orbitals?
Elections are at a variable distance from the nucleus
While there are 2, 8, 18 per orbit, how many electrons are in each orbital?
there are 2 electrons per orbital
Which rule states that all orbitals in a subshell must be half-filled before they are paired up?
Hund's Rule
Which principle states that electrons that are in the same orbital must have opposite spins in an energy level diagram?
The Pauli Exclusion Principle
Which principle states that each electron is added first into the subshell with the lowest energy orbital available?
Aufbau Principle
Which quantum number has the variable n and describes the size and energy levels of an orbital?
Principal Quantum Number
Which quantum number has the variable l, describes the shape of orbital (subshell number), and has each subshell number corresponds to a letter?
Angular momentum (secondary) Quantum #.
Which quantum number describes the orientation of the orbital, which is the number of orbitals in a subshell?
Magnetic Quantum Number
Which quantum number describes the spin of the electron (opposite spins in same orbitals)?
Spin Quantum Number
What are the different ways to write electron configuration?
Energy level diagrams, complete electron configurations, and condensed electron configurations.
Find the number of valence electrons present in an atom with the atomic number 14 of an element.
Answer: 4
Find the total number of p orbitals in element germanium.
Answer: 8
Find the number of electrons in all the d orbitals for bromine.
Answer: 10
Find the total number of orbitals in energy level 3 of an atom.
Answer: 9
Find the electron configuration for a copper(1) cation.
Answer: [Ar]3d¹⁰
What is the complete configuration for a strontium atom?
Answer: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s²
What is the condensed electron configuration for a titanium atom?
Answer: [Ar]4s² 3d²
Find the 6th electron in the 3rd orbital of 3d.
Answer: -2