According to the Bohr's model, what is the maximum number of electrons for the second energy level?

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  1. 6
  2. 4
  3. 8
  4. 2

Answer (Detailed Solution Below)

Option 3 : 8
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The correct answer is 8.

Key Points

  • According to the Bohr model, the second energy level can hold a maximum of 8 electrons.
  • Electrons in an atom are arranged in energy levels or shells, which are denoted by the principal quantum number (n).
  • The formula to determine the maximum number of electrons in a shell is given by 2n2, where n is the principal quantum number.
  • For the second energy level (n=2), the maximum number of electrons is calculated as 2(2)2 = 8.
  • This concept is foundational to understanding the electron configuration of atoms and their chemical properties.

Additional Information

  • Principal Quantum Number (n)
    • It denotes the energy level of an electron within an atom.
    • The value of n determines the size and energy of the orbital.
    • Higher values of n correspond to higher energy levels and larger orbitals.
  • Bohr Model
    • Proposed by Niels Bohr in 1913, it describes electrons orbiting the nucleus in fixed energy levels.
    • Electrons can jump between energy levels by absorbing or emitting specific amounts of energy.
    • The model helped explain the spectral lines of hydrogen.
  • Electron Configuration
    • It describes the distribution of electrons in the different energy levels or orbitals of an atom.
    • It follows a specific order based on the Aufbau principle, Pauli exclusion principle, and Hund's rule.
    • Electron configuration helps predict chemical behavior and bonding.
  • Aufbau Principle
    • It states that electrons fill lower energy orbitals first before moving to higher energy orbitals.
    • This principle guides the order in which atomic orbitals are filled.
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