Atomic and Quantum Phenomena

Question 1

Thomson’s experiment

Answer 1

“plum-pudding model” states that atoms contain positive and negative charges distributed throughout the interior of the atom

Question 2

Ernest Rutherford’s experiment + 4 conclusions

Answer 2

states that the positive region inside the gold atoms was actually concentrated in a very tiny nucleus at its center. 1. atoms are mostly empty space 2. the majority of the mass of an atom is concentrated in a tiny central nucleus 3. the central nucleus is positively charged 4. The electrons orbit the nucleus in a manner similar to planets orbiting the sun

Question 3

Plancks constant

Answer 3

6.63e-34 J*s

Question 4

Electron volt

Answer 4

1 eV = 1.6e-19 J

Question 5

Energy of a photon

Answer 5

E = hf where h is planck’s constant and f is the photon’s frequency OR E = hc/lambda

Question 6

Velocity of photon

Answer 6

v = f*lambda

Question 7

speed of light

Answer 7

f*lambda

Question 8

Neils Bohr experiment

Answer 8

the electrons of atoms could occupy only exact energy levels

Question 9

ground state definition

Answer 9

the lowest level an electron can occupy in Bohr’s model (Closest to the nucleus) (n = 1)

Question 10

Ionization energy def

Answer 10

if the energy of the incoming photons is greater than the energy difference between the ground state and the edge of the atom, the electrons are ejected from the atom and the atom becomes a negative ion.

Question 11

Photoelectric effect

Answer 11

converting photon energy to electric energy (this is how electricity is generated using sunlight)