Quiz for Quantum model

Q1: Who proposed the quantum mechanical model of the atom?

A. Niels Bohr B. Erwin Schrödinger C. Isaac Newton D. John Dalton

Q2: What is the principal quantum number symbolized as?

A. n B. l C. m D. s

Q3: What values can the magnetic quantum number (m) take for l=2?

A. -2, -1, 0, 1, 2 B. -1, 0, 1 C. 0, 1 D. 1, 2, 3

Q4: Which quantum number specifies the orientation of the orbital?

A. Magnetic quantum number (m) B. Spin quantum number (s) C. Principal quantum number (n) D. Angular momentum quantum number (l)

Q5: What are the possible values of spin quantum number (s)?

A. +1/2 and -1/2 B. 0 and 1 C. 1/2 and 3/2 D. 0, ±1

Q6: What is the shape of an s-orbital?

A. Spherical B. Dumbbell C. Double dumbbell D. Planar

Q7: Which orbital shape corresponds to l=1?

A. p-orbital B. s-orbital C. d-orbital D. f-orbital

Q8: How many orbitals are present in the d-subshell?

A. 5 B. 3 C. 7 D. 9

Q9: Which principle states that no two electrons can have the same set of quantum numbers?

A. Pauli exclusion principle B. Aufbau principle C. Hund’s rule D. Heisenberg uncertainty principle

Q10: According to Heisenberg’s uncertainty principle, which two properties cannot be simultaneously known exactly?

A. Position and momentum B. Energy and time C. Mass and velocity D. Charge and spin

Q11: What does the Aufbau principle describe?

A. Order of filling of electrons in orbitals B. Electron spin directions C. Energy quantization D. Atomic radius

Q12: Hund’s rule states that electrons fill orbitals such that?

A. Electrons occupy orbitals singly first with parallel spins B. Electrons pair up immediately C. Electrons fill lowest energy orbital only D. Electrons move randomly

Q13: Which quantum number is responsible for the energy of an electron in an atom?

A. Principal quantum number (n) B. Magnetic quantum number (m) C. Spin quantum number (s) D. Angular momentum quantum number (l)

Q14: What is the maximum number of electrons in the 3rd energy level?

A. 18 B. 8 C. 32 D. 2

Q15: The shape of a p-orbital is?

A. Dumbbell-shaped B. Spherical C. Circular D. Cylindrical

Q16: Which quantum number is also called the azimuthal quantum number?

A. Angular momentum quantum number B. Principal quantum number C. Spin quantum number D. Magnetic quantum number

Q17: The number of nodes in an orbital increases with?

A. Principal quantum number (n) B. Spin quantum number (s) C. Magnetic quantum number (m) D. Angular momentum quantum number (l)

Q18: Which of the following is a fundamental concept of quantum mechanics?

A. Wave-particle duality B. Newton’s laws C. Electrostatic force D. Thermodynamics