7. Describe Bohr's model of the atom using the sketch of different energy levels.
Answers
Answer:
Key points
Bohr's model of hydrogen is based on the nonclassical assumption that electrons travel in specific shells, or orbits, around the nucleus.
Bohr's model calculated the following energies for an electron in the shell, nnn:
E(n)=-\dfrac{1}{n^2} \cdot 13.6\,\text{eV}E(n)=−
n
2
1
⋅13.6eVE, left parenthesis, n, right parenthesis, equals, minus, start fraction, 1, divided by, n, squared, end fraction, dot, 13, point, 6, start text, e, V, end text
Bohr explained the hydrogen spectrum in terms of electrons absorbing and emitting photons to change energy levels, where the photon energy is
h\nu =\Delta E = \left(\dfrac{1}{{n_{low}}^2}-\dfrac{1}{{n_{high}}^2}\right) \cdot 13.6\,\text{eV}hν=ΔE=(
n
low
2
1
−
n
high
2
1
)⋅13.6eVh, \nu, equals, delta, E, equals, left parenthesis, start fraction, 1, divided by, n, start subscript, l, o, w, end subscript, squared, end fraction, minus, start fraction, 1, divided by, n, start subscript, h, i, g, h, end subscript, squared, end fraction, right parenthesis, dot, 13, point, 6, start text, e, V, end text
Bohr's model does not work for systems with more than one electron.
The planetary model of the atom
At the beginning of the 20th century, a new field of study known as quantum mechanics emerged. One of the founders of this field was Danish physicist Niels Bohr, who was interested in explaining the discrete line spectrum observed when light was emitted by different elements. Bohr was also interested in the structure of the atom, which was a topic of much debate at the time. Numerous models of the atom had been postulated based on experimental results including the discovery of the electron by J. J. Thomson and the discovery of the nucleus by Ernest Rutherford. Bohr supported the planetary model, in which electrons revolved around a positively charged nucleus like the rings around Saturn—or alternatively, the planets around the sun.
Explanation:
Answer:
The Bohr model shows that the electrons in atoms are in orbits of differing energy around the nucleus (think of planets orbiting around the sun). Bohr used the term energy levels (or shells) to describe these orbits of differing energy.
Explanation:
hope it helps you