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Question
Complete the following statements :
Isotopes have different mass numbers because their nuclei contain different number of ............
Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called .............
Fill in the Blanks
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Solution
Isotopes have different mass numbers because their nuclei contain different number of neutrons.
Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called isotopes.
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