SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
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20
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10
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5
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25
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Explanation:
Detailed explanation-1: -An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number. 20. The answer is 25.
Detailed explanation-2: -So, the mass number of the element is 22.
Detailed explanation-3: -No. of neutron = Mass number(Z)-Atomic number (A) = 25-12 =13.
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