- 1. Atomic physics is the field of physics that studies atoms as a whole, with a focus on their structure, properties, interactions, and behavior. Atoms are the basic building blocks of matter, consisting of a nucleus of protons and neutrons surrounded by electrons in orbitals. Understanding atomic physics helps us comprehend the nature of matter and the fundamental forces that govern the universe. It has applications in various areas such as quantum mechanics, nuclear energy, and materials science. Researchers in atomic physics study phenomena like atomic spectra, electron configurations, and atomic collisions to uncover the secrets of the microscopic world and advance our knowledge of the physical laws that shape our reality.
What is the subatomic particle with a positive charge in an atom?
A) Electron
B) Proton
C) Neutron
D) Photon
- 2. Who proposed the planetary model of the atom?
A) Niels Bohr
B) Erwin Schrödinger
C) Max Planck
D) Albert Einstein
- 3. What is the smallest unit of matter?
A) Neutron
B) Atom
C) Electron
D) Molecule
- 4. Which element has the atomic number 79?
A) Iron
B) Platinum
C) Gold
D) Silver
- 5. What is the name of the process where an unstable atomic nucleus loses energy by emitting radiation?
A) Radioactive decay
B) Alpha decay
C) Nuclear fission
D) Nuclear fusion
- 6. What is the total number of electrons that can occupy the 'd' sublevel?
A) 6
B) 10
C) 14
D) 4
- 7. What is the unit of energy used in atomic physics?
A) Electronvolt
B) Newton
C) Joule
D) Calorie
- 8. Who discovered the electron?
A) Marie Curie
B) J.J. Thomson
C) Ernest Rutherford
D) Max Planck
- 9. What is the maximum number of electrons that can occupy the second energy level in an atom?
A) 6
B) 2
C) 18
D) 8
- 10. Which scientist proposed the wave-particle duality of matter?
A) Louis de Broglie
B) Max Planck
C) Erwin Schrödinger
D) Werner Heisenberg
- 11. What is the process by which a nucleus splits into smaller nuclei?
A) Beta decay
B) Nuclear fusion
C) Radioactive decay
D) Nuclear fission
- 12. Which scientist formulated the quantum theory of electromagnetic radiation?
A) Erwin Schrödinger
B) Louis de Broglie
C) Max Planck
D) Werner Heisenberg
- 13. What is the process by which two atomic nuclei combine to form a heavier nucleus?
A) Alpha decay
B) Radioactive decay
C) Nuclear fission
D) Nuclear fusion
- 14. What is the electromagnetic radiation with wavelengths longer than visible light?
A) Gamma rays
B) Ultraviolet radiation
C) Infrared radiation
D) X-rays
- 15. Which scientist is known for the uncertainty principle in quantum mechanics?
A) Werner Heisenberg
B) Erwin Schrödinger
C) Max Planck
D) Niels Bohr
- 16. What is the process by which an atomic nucleus emits an alpha particle?
A) Beta decay
B) Gamma decay
C) Neutron capture
D) Alpha decay
- 17. Which element has the atomic number 1?
A) Nitrogen
B) Carbon
C) Oxygen
D) Hydrogen
- 18. What is the term for the energy required to remove an electron from an atom?
A) Atomic mass
B) Electron affinity
C) Molar mass
D) Ionization energy
- 19. What is the total number of orbitals in the 'p' sublevel?
A) 5
B) 1
C) 7
D) 3
- 20. Who discovered the neutron?
A) James Chadwick
B) Ernest Rutherford
C) Niels Bohr
D) J.J. Thomson
- 21. What is the nucleus of an atom primarily composed of?
A) Electrons
B) Positrons
C) Photons
D) Protons and neutrons
- 22. What is the maximum number of electrons that can occupy the 3rd energy level of an atom?
A) 8
B) 12
C) 10
D) 18
- 23. What is the name of the principle stating that no two electrons in an atom can have the same set of quantum numbers?
A) Hund's rule
B) Pauli exclusion principle
C) Schrodinger's equation
D) Aufbau principle
- 24. Who proposed the famous equation E=mc² related to mass-energy equivalence?
A) Albert Einstein
B) Stephen Hawking
C) Isaac Newton
D) Galileo Galilei
- 25. An atom with the same number of protons but different number of neutrons is called an:
A) Molecule
B) Isotope
C) Element
D) Ion
- 26. What is the charge of the nucleus of an atom?
A) Variable
B) Neutral
C) Positive
D) Negative
- 27. Which subatomic particle has a negative charge?
A) Positron
B) Neutron
C) Electron
D) Proton
- 28. The number of protons in an atom determines its:
A) Valence electrons
B) Neutron number
C) Atomic number
D) Atomic mass
- 29. When an atom gains or loses electrons, it becomes an:
A) Molecule
B) Ion
C) Element
D) Isotope
- 30. What is the maximum number of electrons that can be accommodated in an 's' orbital?
A) 4
B) 8
C) 6
D) 2
- 31. The quantum mechanical model describes the behavior of electrons in terms of:
A) Orbital notation
B) Wave functions
C) Atomic numbers
D) Nuclear charge
- 32. How many electrons can occupy the p subshell?
A) 6
B) 14
C) 10
D) 2
- 33. What is the term for the distance between consecutive peaks of a wave?
A) Frequency
B) Amplitude
C) Wavelength
D) Period
- 34. Which element has the symbol 'Ca' on the periodic table?
A) Calcium
B) Cobalt
C) Carbon
D) Cadmium
- 35. What is the SI unit of frequency?
A) Watts (W)
B) Newton (N)
C) Hertz (Hz)
D) Joules (J)
- 36. What is the phenomenon where an electron exhibits both wave-like and particle-like properties?
A) Wave-particle duality
B) Quantum entanglement
C) Superposition
D) Pauli exclusion principle
- 37. What is the stable isotope of carbon with 6 protons and 6 neutrons?
A) Carbon-16
B) Carbon-14
C) Carbon-10
D) Carbon-12
- 38. What is the term used to describe atoms of the same element with different numbers of neutrons?
A) Isotones
B) Isobars
C) Isomers
D) Isotopes
- 39. What is the term for the positively charged central core of an atom?
A) Quark
B) Electron cloud
C) Nucleus
D) Orbit
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