1. The Balmer lines are from a. The transition of hydrogen atoms into the lowest

Question

1. 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.

2. 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

3. A hot atomic gas produces

a. Blackbody absorption.

b. Blackbody emission.

c. Absorption lines.

d. Emission lines.

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

a. has unique photons.

b. has a unique set of electron orbitals.

c. has atoms of a unique color.

d. has a unique set of neutrons.

5. 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

Explanation / Answer

1) Balmer lines are the from the transition of hydrogen atom in to n=2 level. option b

2) Emission lines are caused when an electron moves to lower energy : Absorption lines are caused when an electron moves to higher energy . Option c

** answering only first two question due to policy and time contraints.

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