Atomic Structure

Bohr’s Atomic Model

1. Proposed by Niels Bohr in 1913 to address the limitations of Rutherford’s atomic model.
2. Electrons move in specific quantized orbits around the nucleus without radiating energy.
3. These orbits are called energy levels or shells, denoted by n (n = 1, 2, 3...).
4. The energy of an electron is constant in a specific orbit.
5. An electron can move to a higher orbit by absorbing energy or to a lower orbit by emitting energy

1. An atom is the smallest unit of matter that retains the properties of an element.
2. It consists of a nucleus at the center and electrons orbiting around it.
3. The nucleus contains protons (positively charged particles) and neutrons (neutral particles).
4. Electrons are negatively charged and occupy distinct energy levels or shells.
5. Atoms are electrically neutral because the number of protons equals the number of electrons.

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