Section 2 - Electromagnetic Radiation and Quantum Phenomena

Question 1

What is an Isotope?

Answer 1

A varied element with the same number of Protons and Electrons but a differing number of Neutrons.

Question 2

E = hf =

Answer 2

hc/lamda.

Question 3

What is a photon?

Answer 3

A discrete packet of EM waves.

Question 4

What is excitation?

Answer 4

The movement of electrons to a higher energy level.

Question 5

What is ionisation energy?

Answer 5

The energy required to remove electrons from the ground state of an atom.

Question 6

1 eV =

Answer 6

1.60x10^-19 J

Question 7

Planck’s constant =

Answer 7

6.63x10^-34 Js^-1

Question 8

An increase of frequency during the Photoelectric effect causes Photoelectrons to…

Answer 8

have increased Kinetic energy.

Question 9

An increase of intensity during the Photoelectric effect causes Photoelectrons to…

Answer 9

have an increased number of Photoelectrons be removed.

Question 10

Electrons can only be at…

Answer 10

definite energy levels.

Question 11

What is Wave Particle Duality?

Answer 11

Where both particles behave as waves and waves as particles.

Question 12

What does diffraction prove in terms of light?

Answer 12

That light has wave properties.

Question 13

What does the Photoelectric effect prove in terms of light?

Answer 13

That light has particle properties.

Question 14

Wavelength of a particle =

Answer 14

h/mv