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The atomic number of an element is the total number of which atomic particles?
The neutron was discovered by Chadwick in 1932
6
Protons
Electrons were discovered when an electric current was passed through gases at low pressures.
The mass of a neutron nearly equals the mass of a proton.
Atoms of the same element are always identical.
Subtract the number of protons from the mass number.
30 protons, 30 electrons
An element has an atomic number of 30. How many protons and electrons are in a neutral atom of the element?
The neutron was discovered by Chadwick in 1932
6
Protons
Electrons were discovered when an electric current was passed through gases at low pressures.
The mass of a neutron nearly equals the mass of a proton.
Atoms of the same element are always identical.
Subtract the number of protons from the mass number.
30 protons, 30 electrons
Which of the following is correct concerning subatomic particles?
The neutron was discovered by Chadwick in 1932
6
Protons
Electrons were discovered when an electric current was passed through gases at low pressures.
The mass of a neutron nearly equals the mass of a proton.
Atoms of the same element are always identical.
Subtract the number of protons from the mass number.
30 protons, 30 electrons
How is the number of neutrons in the nucleus of an atom calculated?
The neutron was discovered by Chadwick in 1932
6
Protons
Electrons were discovered when an electric current was passed through gases at low pressures.
The mass of a neutron nearly equals the mass of a proton.
Atoms of the same element are always identical.
Subtract the number of protons from the mass number.
30 protons, 30 electrons
Which statement about the discovery of electrons is true?
The neutron was discovered by Chadwick in 1932
6
Protons
Electrons were discovered when an electric current was passed through gases at low pressures.
The mass of a neutron nearly equals the mass of a proton.
Atoms of the same element are always identical.
Subtract the number of protons from the mass number.
30 protons, 30 electrons
Select the correct statement about subatomic particles.
The neutron was discovered by Chadwick in 1932
6
Protons
Electrons were discovered when an electric current was passed through gases at low pressures.
The mass of a neutron nearly equals the mass of a proton.
Atoms of the same element are always identical.
Subtract the number of protons from the mass number.
30 protons, 30 electrons
Dalton's atomic theory includes which idea?
The neutron was discovered by Chadwick in 1932
6
Protons
Electrons were discovered when an electric current was passed through gases at low pressures.
The mass of a neutron nearly equals the mass of a proton.
Atoms of the same element are always identical.
Subtract the number of protons from the mass number.
30 protons, 30 electrons
Using the periodic table, determine the number of neutrons in carbon.
The neutron was discovered by Chadwick in 1932
6
Protons
Electrons were discovered when an electric current was passed through gases at low pressures.
The mass of a neutron nearly equals the mass of a proton.
Atoms of the same element are always identical.
Subtract the number of protons from the mass number.
30 protons, 30 electrons
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