U1-1-3 - Atomic Spectra

Question 1

When energy is transferred to atoms, electrons within the atoms may be _________________________.

Answer 1

promoted to higher energy levels

Question 2

An atom emits a _________ when an
excited electron moves from a higher energy level to a lower energy level.

Answer 2

photon

Question 3

An atom emits a photon when an
_________ electron moves from a higher energy level to a lower energy level.

Answer 3

excited

(increased energy)

Question 4

An atom emits a photon when an
excited electron moves from _______________________________.

Answer 4

a higher energy level to a lower energy level

Question 5

In emission spectroscopy, what is used to excite the electrons within atoms?

Answer 5

Heat

Question 6

Why do atomic spectra show multiple discrete lines?

Answer 6

Different electron transitions (between different energy levels).

Each transition produces a line.

Question 7

Atomic Spectroscopy

The concentration of an element within a sample is related to the intensity of light emitted or absorbed.

Higher intensity = ____________ concentration.

Answer 7

higher

Question 8

The energy of a photon emitted when an excited electron falls to a lower energy level is equal to __________________.

Answer 8

the energy gap between the two energy levels