GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many neutrons does the isotope below have? 89 36Kr
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53
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36
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89
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125
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Explanation:
Detailed explanation-1: -One of the stable isotopes of lithium has 3 protons and 4 neutrons, so its atomic mass is 7.
Detailed explanation-2: -Boron has two isotopes, boron-10 and boron-11. Boron-10 has five protons and five neutrons.
Detailed explanation-3: -Step 1: Identify the mass number of the isotope. Step 2: Identify the atomic number of the element. Step 3: Calculate the number of neutrons by subtracting the atomic number (the number of protons) from the mass number.
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