Atomic Structure Quiz

Atomic Structure Questions and Answers

• Question 1: Which particle has no charge?

  • Neutron

• Question 2: What determines the atomic number of an element?

  • Number of protons

• Question 3: Who proposed the plum pudding model?

  • J.J. Thomson

• Question 4: What did Rutherford's gold foil experiment discover?

  • Nucleus

• Question 5: What is the mass number of an atom?

  • Sum of protons and neutrons

• Question 6: How do electrons move in Bohr's model?

  • Circular orbits

• Question 7: Who developed the quantum mechanical model?

  • Erwin Schrodinger

• Question 8: What is the isotope of hydrogen with one neutron?

  • Deuterium

• Question 9: Which particle is found in the nucleus?

  • Proton

• Question 10: What does the Heisenberg Uncertainty Principle relate to?

  • Position and momentum of a particle

• Question 11: What does the principal quantum number represent?

  • n

• Question 12: What is the shape of an s-orbital?

  • Spherical

• Question 13: What does the Pauli Exclusion Principle state?

  • No two electrons in an atom can have the same set of quantum numbers

• Question 14: What's the maximum number of electrons in an f-orbital?

  • 14

• Question 15: Which element is a transition metal?

  • Iron

• Question 16: What's the electron configuration of an atom with atomic number 15?

  • 1s² 2s² 2p⁶ 3s² 3p³

• Question 17: Which element has the configuration [Ar] 4s² 3d⁴?

  • Chromium

• Question 18: What does the Aufbau principle determine?

  • Order of filling atomic orbitals

• Question 19: What is associated with the de Broglie wavelength?

  • Particles and waves

• Question 20: What are the possible values of the spin quantum number?

  • +1/2 and -1/2

• Question 21: In Rutherford's model, what is the majority of the atom's volume?

  • Empty space

• Question 22: Which atom has the smallest atomic radius?

  • Helium

• Question 23: How many valence electrons does nitrogen have?

  • 5

• Question 24: What is ionization energy?

  • Energy required to remove an electron from an atom

• Question 25: Which element has the highest electronegativity?

  • Fluorine

• Question 26: What does an alpha particle consist of?

  • Two protons and two neutrons

• Question 27: What is electron affinity?

  • Energy change when an electron is added to an atom

• Question 28: What is the Bohr model based on?

  • Classical mechanics

• Question 29: What is the atomic mass of an element?

  • Weighted average of the masses of its isotopes

• Question 30: How many neutrons are in an isotope with mass number 35 and atomic number 17?

  • 18

• Question 31: Which particle is not a fundamental particle?

  • Photon

• Question 32: What defines an isotope?

  • Atoms with the same number of protons, different number of neutrons

• Question 33: What describes the probability distribution of an electron?

  • Schrodinger equation

• Question 34: Which quantum number describes the shape of an orbital?

  • Azimuthal quantum number (l)

• Question 35: Are energy levels in an atom continuous or discrete?

  • Discrete

• Question 36: What is the electron configuration of chlorine (atomic number 17)?

  • 1s² 2s² 2p⁶ 3s² 3p⁵

• Question 37: Which element has the valence configuration 4s² 3d⁴?

  • Chromium

• Question 38: What principle describes the emission of electrons from a metal surface by light?

  • Photoelectric effect

• Question 39: What is the sum of protons and neutrons called?

  • Mass number

• Question 40: What describes the dual nature of matter?

  • De Broglie hypothesis

• Question 41: How does atomic radius change across a period and down a group?

  • Decreases across a period, increases down a group

• Question 42: What's the electron configuration of the element with atomic number 12?

  • 1s² 2s² 2p⁶ 3s²

• Question 43: Which particle is not a fermion?

  • Photon

• Question 44: What force holds the nucleus of an atom together?

  • Strong nuclear force

• Question 45: What is the maximum number of electrons that can be accommodated in the second energy level?

  • 8

• Question 46: Which quantum number indicates the orientation of an orbital?

  • Magnetic quantum number (ml)

• Question 47: What defines isoelectronic species?

  • Same number of electrons

• Question 48: Which element has the configuration [Kr] 5s¹ 4d⁵?

  • Technetium (Tc)

• Question 49: How does ionization energy generally change across a period and down a group?

  • Increases across a period, decreases down a group

• Question 50: What is the hybridization of carbon in methane (CH₄)?

  • sp³