SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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11
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5
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6
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16
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Detailed explanation-1: -Hence the number of protons is 11, number of electrons is 11 and number of neutrons is 24−11=13. Q. Q.
Detailed explanation-2: -Boron has an atomic number of 5 which means it has 5 protons. We assume atoms are neutral so the atom also has 5 electrons. It has an atomic mass (average mass) of 10.811 which we would round up to 11 (the mass of the most common Boron atom) so it has 11 total particles in its nucleus (protons + neutrons).
Detailed explanation-3: -The other 80% of the atoms are B-11, which is an isotope of boron with 6 neutrons and a mass of 11amu.
Detailed explanation-4: -The atomic number (Z) of the atom = 5. The mass number (A) of the atom = 11. The atomic number (Z) of an atom = number of protons or the number of electrons. Thus, the neutral atom contains 5 electrons.
Detailed explanation-5: -Number of neutrons = Mass number-Atomic number Number of neutrons = 23-11 = 12.