Question

The Balmer lines are from

a) The transition of hydrogen atoms into the lowest energy level

b) The transition of hydrogen atoms into the n=2 level.

c) The transition of helium atoms into the lowest energy level.

d) The transition of oxygen atoms to the lowest energy level.

Emission lines are caused when an electron moves ____ energy; Absorption lines are caused when an electron moves ______ energy

a) to higher; to lower

b) to a higher n; to a lower n

c) to lower energy; to higher energy

A hot atomic gas produces

a) Blackbody absorption.

b) Emission lines.

c) Blackbody emission.

d) Absorption lines.

Atoms of different elements have unique spectral lines because each element:

a) has a unique set of electron orbitals.

b) has unique photons.

c) has a unique set of neutrons.

d) has atoms of a unique color.

An atom has energy levels of E= -9, -5, -2, and -1. It has one electron in the -1 energy level. Which of the following photons can it emit?

a) A photon with E=2

b) A photon with E=4

c) A photon with E=5

d) A photon with E=10

Answer 1