SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Protons
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Neutrons
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Electrons
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Only Protons and Neutrons
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Detailed explanation-1: -Together, the number of protons and the number of neutrons determine an element’s mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
Detailed explanation-2: -The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Detailed explanation-3: -An element and its location in the periodic table is determined according to the number of protons in the nucleus. The electrons influence the atom’s electric charge.
Detailed explanation-4: -Because electrons have virtually no mass, just about all the mass of an atom is in its protons and neutrons. Therefore, the total number of protons and neutrons in an atom determines its mass in atomic mass units (Table 4.5.
Detailed explanation-5: -The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass.