SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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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 number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Detailed explanation-3: -To find the number of neutrons, subtract the number of protons from the mass number. number of neutrons=40−19=21.
Detailed explanation-4: -You can simply subtract the atomic number from the mass number in order to find the number of neutrons.
Detailed explanation-5: -number of protons = atomic number. number of electrons = atomic number. number of neutrons = mass number-atomic number.