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An atom of phosphorus has 15 protons, 16 neutrons, and 15 electrons. What is the atom's mass number?
Protons and neutrons both have masses of approximately 1 amu, whereas the mass of an electron is negligible. Therefore, the mass number is equal to the number of protons and neutrons, which is 31.
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An atom of phosphorus has 15 protons, 16 neutrons, and 15 electrons. What is the atom's mass number?
Protons and neutrons both have masses of approximately 1 amu, whereas the mass of an electron is negligible. Therefore, the mass number is equal to the number of protons and neutrons, which is 31.
Compare your answer with the correct one above
An atom of phosphorus has 15 protons, 16 neutrons, and 15 electrons. What is the atom's mass number?
Protons and neutrons both have masses of approximately 1 amu, whereas the mass of an electron is negligible. Therefore, the mass number is equal to the number of protons and neutrons, which is 31.
Compare your answer with the correct one above
An atom of phosphorus has 15 protons, 16 neutrons, and 15 electrons. What is the atom's mass number?
Protons and neutrons both have masses of approximately 1 amu, whereas the mass of an electron is negligible. Therefore, the mass number is equal to the number of protons and neutrons, which is 31.
Compare your answer with the correct one above