Quantum Numbers Quiz

Questions and Answers

Which quantum number determines the energy level of an electron in an atom?

Principal quantum number (n)

Which quantum number describes the shape of an orbital?

Angular quantum number (l)

For an electron in an atom with n = 3, what are the possible values of l?

0, 1, 2

For an electron in an atom with l = 2, what are the possible values of ml?

-2, -1, 0, 1, 2 Signup and view all the answers

How many atomic orbitals are possible for an electron in an atom with n = 4?

16 Signup and view all the answers

Which scientist proposed the first atomic model?

John Dalton Signup and view all the answers

What did J.J. Thomson discover through his experiments with cathode rays?

The existence of electrons Signup and view all the answers

Which scientist conducted the gold foil experiment and discovered the nucleus of an atom?

Ernest Rutherford Signup and view all the answers

What is the main difference between the Bohr model and the quantum mechanical model of the atom?

The Bohr model incorporates the concept of electron energy levels, while the quantum mechanical model incorporates the concept of electron orbitals Signup and view all the answers

What is the atomic number of an atom?

The number of protons in the nucleus of an atom Signup and view all the answers

Study Notes

Quantum Numbers and Atomic Orbitals

The principal quantum number (n) determines the energy level of an electron in an atom.
The azimuthal quantum number (l) describes the shape of an orbital.
For an electron in an atom with n = 3, the possible values of l are 0, 1, and 2.
For an electron in an atom with l = 2, the possible values of ml are -2, -1, 0, 1, and 2.

Atomic Models and Experiments

J.J. Thomson proposed the first atomic model, known as the plum pudding model.
Through his experiments with cathode rays, J.J. Thomson discovered the electron.
Ernest Rutherford conducted the gold foil experiment and discovered the nucleus of an atom.
The main difference between the Bohr model and the quantum mechanical model of the atom is that the Bohr model assumes electrons occupy specific energy levels, whereas the quantum mechanical model introduces wave functions and orbitals.

Atomic Structure

The atomic number of an atom is the number of protons in the nucleus of an atom.
The number of atomic orbitals possible for an electron in an atom with n = 4 is 16 (1s, 3p, 5d, and 7f orbitals).