GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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10
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18
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28
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8
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Detailed explanation-1: -If the mass number is 18 and the atomic number is 10 (number of protons) then there are 10 protons and 8 neutrons (18−10=8).
Detailed explanation-2: -Oxygen has an atomic number of 8, meaning it has eight protons. The mass number of the atom is given after the element name when identifying the isotope, thus the mass number of oxygen-18 is 18. When we subtract the 8 protons from the mass number 18, we are left with 10 neutrons.
Detailed explanation-3: -Fluorine has 8 protons and 10 neutrons. We know that the sum of number of neutrons and the number of protons is called mass number. Here, number of protons are 8 and number of neutrons are 10. The mass of fluorine is 18 u. So, fluorine has 8 protons and 10 neutrons.
Detailed explanation-4: -Carbon-14: with 6 protons and 8 neutrons, and an atomic mass of 14.