ELECTRONIC STRUCTURE OF THE ATOM

Question 1

_______ a student of Rutherford, proposed another model of the atom. His model used the concept of quantization of energy of electrons in the atom.

He developed a quantum model of the electron cloud of an atom using data from the hydrogen spectrum in which electrons are located in a ______

Answer 1

NIELS BOHR’S ATOMIC MODEL

definite orbit

Question 2

• Bohr’s main assumption in his model is
  that electrons occupy definite orbits that
  require the electron to have a specific
  amount of energy.
• These possible orbits are called _______ . These energy levels are
  quantized, which means that only specific
  values are possible.
• Each energy level can accommodate a
  maximum number of 2n2 electrons

Answer 2

ENERGY LEVELS (SHELL)

Question 3

For example, carbon has an atomic
number of 6. Thus, in a neutral atom, the
number of electrons will also be 6.
Using Bohr model, the distribution of
electrons for carbon is
For Chlorine (atomic number is 17)
For Selenium (atomic number is 34)

Answer 3

EE

Question 4

- The energy of an electron in an atom
can change only by going from one
energy level to another.
- When an atom’s energy is increased,
such as when a substance is heated,
the energy of the electrons in the
atom also increases. They are said to
be in an \_\_\_\_\_\_\_\_

Answer 4

excited state

Question 5

For the excited electron to go back to
its original state, also called the
______, energy has to be
released.

Answer 5

ground state