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During a flame test, ions of a specific metal are heated in the flame of a gas burner. A characteristic color of light is emitted by these ions in the flame when the electrons ____.
the numbers of protons and electrons are equal.
10 protons
emit energy as they return to lower energy levels
Co to Ni
N: 41.1%, H: 11.8%, S: 47.1%
Lithium Bromide
CaCrO4
1,5,3,4
What is the percentage composition by mass of ammonium sulfide, (NH4)2S?
the numbers of protons and electrons are equal.
10 protons
emit energy as they return to lower energy levels
Co to Ni
N: 41.1%, H: 11.8%, S: 47.1%
Lithium Bromide
CaCrO4
1,5,3,4
An atom is electrically neutral because
the numbers of protons and electrons are equal.
10 protons
emit energy as they return to lower energy levels
Co to Ni
N: 41.1%, H: 11.8%, S: 47.1%
Lithium Bromide
CaCrO4
1,5,3,4
What is the formula for Calcium chromate?
the numbers of protons and electrons are equal.
10 protons
emit energy as they return to lower energy levels
Co to Ni
N: 41.1%, H: 11.8%, S: 47.1%
Lithium Bromide
CaCrO4
1,5,3,4
What coefficients correctly balance the formula equation, C3H8 + O2 → CO2 + H2O?
the numbers of protons and electrons are equal.
10 protons
emit energy as they return to lower energy levels
Co to Ni
N: 41.1%, H: 11.8%, S: 47.1%
Lithium Bromide
CaCrO4
1,5,3,4
Neon-22 contains 12 neutrons. It has how many protons?
the numbers of protons and electrons are equal.
10 protons
emit energy as they return to lower energy levels
Co to Ni
N: 41.1%, H: 11.8%, S: 47.1%
Lithium Bromide
CaCrO4
1,5,3,4
Which substance can be broken down by chemical means?
the numbers of protons and electrons are equal.
10 protons
emit energy as they return to lower energy levels
Co to Ni
N: 41.1%, H: 11.8%, S: 47.1%
Lithium Bromide
CaCrO4
1,5,3,4
Which of the following ordered pairs of elements shows an increase in atomic number but a decrease in average atomic mass?
the numbers of protons and electrons are equal.
10 protons
emit energy as they return to lower energy levels
Co to Ni
N: 41.1%, H: 11.8%, S: 47.1%
Lithium Bromide
CaCrO4
1,5,3,4
Check it!