Final answer:
Bohr's Model of the atom is still used today despite limitations because it introduced the concept of quantized orbits for electrons and explained the hydrogen spectrum, although it's been refined by quantum mechanics.Option 1 is correct answer.
Step-by-step explanation:
The model of the atom that is still used today despite its limitations is Bohr's Model. Niels Bohr, building upon the nuclear atom theory by Ernest Rutherford, proposed in 1913 that the electron moves in specific circular orbits around the nucleus and that these orbits could have only certain allowed radii. Although we now understand that actual electron behavior is more accurately represented by quantum mechanics, Bohr's model introduced the idea of quantized orbits for electrons and explained the atomic spectrum of hydrogen. Furthermore, it combined classical concepts with emerging quantum theories. The Quantum-Mechanical Model or Schrödinger's Model offers a more accurate representation of atomic behavior, but the simplicity of the Bohr model allows it to still be used for certain explanatory purposes in chemistry.