GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Look at the atomic number
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Add electrons and protons
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Add protons and neutrons
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Add neutrons and electrons
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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: -Calculating numbers of subatomic particles To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number. number of neutrons = mass number-atomic number.
Detailed explanation-3: -Look Up Atomic Mass on the Periodic Table. Sum of Protons and Neutrons for a Single Atom. Weighted Average for All Atoms of an Element. 14-Feb-2020