Atomic Emission Spectra

What can a flame test distinguish?

• calcium chloride and barium chloride

• calcium chloride and calcium nitrate

• ethanoic acid and propanoic acid

• any two metals

What is the cause of atomic spectra? Changes in the energy of ______________.

• protons

• neutrons

• elctrons

• positron

Tags

NGSS.HS-PS4-3

In Bohr’s, model of the atom, where are the electrons and protons located?

• The electrons move around the protons, which are at the center of the atom.

• The electrons and protons move throughout the atom.

• The electrons occupy fixed positions around the protons, which are at the center of the atom.

• The electrons and protons are located throughout the atom, but they are not free to move.

For an electron in an atom to change from the ground state to an excited state, ____________________.

• energy must be emitted

• energy must be absorbed

• energy must be released

• electron must go down to a lower level

Tags

NGSS.HS-PS1-2

How does the energy of an electron change when the electron moves closer to the nucleus?

• It increases.

• It decreases.

• It remains constant.

• It doubles.

What particle moves around the nucleus of an atom?

• proton

• neutron

• electron

• positron

What should happen to an electron for it to move from a lower energy level to a higher energy level?

• Absorb Energy

• Release Energy

• Merge with a proton

• Displace a neutron

Tags

NGSS.HS-PS1-2

What should happen to an electron for it to move from a higher energy level to a lower energy level?

• Absorb Energy

• Release Energy

• Merge with a proton

• Displace a neutron

Who was the Danish physicist who explained how different elements emit different spectral colors?

• James Chadwick

• Neils Bohr

• J.J. Thomson

• John Dalton

Tags

NGSS.HS-PS4-3

What was the model used to explain the phenomena described in the emission of different spectral colors?

• Plum Pudding Model

• Nuclear Model

• Solid Sphere Model

• Hydrogen Atom Model

Tags

NGSS.HS-PS4-3