Emission Spectra [P]

Question 1

This is about the Emission Spectra. Explain the change of state of electrons in atoms.

Answer 1

Atoms have multiple shells.
Electrons occupy the closest shell to the Nucleus, known as the ‘ground state.
When electrons get energy, they climb the energy levels (shells) and go into ‘excited state’.
Electrons don’t stay excited for long and eventually give out their energy and return to ground state.

Question 2

How is a bar-code like pattern created?

Answer 2

Different atoms have different amount of electrons and the gap between energy levels. This means they produce their own characteristic patterns.

Question 3

What is a ‘Photon’?

Answer 3

Photons are another word for Light, as light is emitted in packets of energy known as photons.

Question 4

The amount of energy in light is __________ to the frequency. The equation for this is E (energy in joules) = h (Planck’s constant) x f (frequency in hertz)

Answer 4

Proportional

Question 5

How do you calculate the energy difference and frequency for an atom’s energy levels?

Answer 5

Convert the powers to the same.
Subtract the difference between the 2 energy levels.
Use the formula F = E/H to find the frequency.
Use the formula V =FH to find the wave speed.

Question 6

In the formulae E = hf What does each letter mean?

Answer 6

E = energy (joules, J)
H = Planck’s Constant (6.63 x 10^-34)
F = Frequency (Hertz, Hz)