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Which statement about subatomic particles is true?
the sum of the protons and neutrons in one atom of the element.
period
atomic number from mass number.
The electron has gained energy.
atomic number.
They are isotopes of oxygen.
The number of protons in the nucleus does not equal the number of neutrons.
An electron has far less mass than either a proton or neutron.
To find the number of neutrons in an atom, you would subtract
the sum of the protons and neutrons in one atom of the element.
period
atomic number from mass number.
The electron has gained energy.
atomic number.
They are isotopes of oxygen.
The number of protons in the nucleus does not equal the number of neutrons.
An electron has far less mass than either a proton or neutron.
Which statement is true about oxygen-17 and oxygen-18?
the sum of the protons and neutrons in one atom of the element.
period
atomic number from mass number.
The electron has gained energy.
atomic number.
They are isotopes of oxygen.
The number of protons in the nucleus does not equal the number of neutrons.
An electron has far less mass than either a proton or neutron.
The number of protons in one atom of an element is that element’s
the sum of the protons and neutrons in one atom of the element.
period
atomic number from mass number.
The electron has gained energy.
atomic number.
They are isotopes of oxygen.
The number of protons in the nucleus does not equal the number of neutrons.
An electron has far less mass than either a proton or neutron.
A horizontal row on the periodic table is called
the sum of the protons and neutrons in one atom of the element.
period
atomic number from mass number.
The electron has gained energy.
atomic number.
They are isotopes of oxygen.
The number of protons in the nucleus does not equal the number of neutrons.
An electron has far less mass than either a proton or neutron.
What can you assume has happened if an electron moves to a higher energy level?
the sum of the protons and neutrons in one atom of the element.
period
atomic number from mass number.
The electron has gained energy.
atomic number.
They are isotopes of oxygen.
The number of protons in the nucleus does not equal the number of neutrons.
An electron has far less mass than either a proton or neutron.
Suppose an atom has a mass number of 23. Which statement is true beyond any doubt?
the sum of the protons and neutrons in one atom of the element.
period
atomic number from mass number.
The electron has gained energy.
atomic number.
They are isotopes of oxygen.
The number of protons in the nucleus does not equal the number of neutrons.
An electron has far less mass than either a proton or neutron.
The mass number of an element is
the sum of the protons and neutrons in one atom of the element.
period
atomic number from mass number.
The electron has gained energy.
atomic number.
They are isotopes of oxygen.
The number of protons in the nucleus does not equal the number of neutrons.
An electron has far less mass than either a proton or neutron.
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