Midyear Electrons in Atoms True-False

Question 1

Always True, Sometimes True, or Never True?
The energy of a body can change only in small discrete units.

Answer 1

always true

Question 2

Always True, Sometimes True, or Never True?
The position and velocity of an electron in an atom can be determined with great certainty

Answer 2

never true

Question 3

Always True, Sometimes True, or Never True?
Above the threshold frequency, increasing the intensity of the light striking a metal increases the number of electrons ejected

Answer 3

Always true

Question 4

Always True, Sometimes True, or Never True?
Electrons moving from one energy level to another emit photons

Answer 4

Sometimes true

Question 5

Always True, Sometimes True, or Never True?
The photoelectric effect will occur no matter what frequency of light strikes a metal

Answer 5

Never true

Question 6

Always True, Sometimes True, or Never True?
In the Bohr model of the hydrogen atom, when the electron is in the ground state, n=1

Answer 6

Always true

Question 7

Always True, Sometimes True, or Never True?
The lines in the emission spectrum of hydrogen can be correlated to transitions of electrons from higher energy levels to lower energy levels

Answer 7

always true

Question 8

Always True, Sometimes True, or Never True?
The outermost s orbital of an atom contains two electrons

Answer 8

sometimes true

Question 9

Always True, Sometimes True, or Never True?
According to quantum mechanics, the motions of subatomic particles may be described as wavelike

Answer 9

Always true