SSC
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: -Answer. Answer: Neon-22, what is the 22? An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
Detailed explanation-2: -From the example, you can see that this magnesium atom would have 12 protons, 13 neutrons, and 10 electrons. Its mass is 25 (12 p + 13 n) and its charge is +2 (12 p-10 e).
Detailed explanation-3: -Again, the total number of protons defines the atomic number of a neutral atom. Manganese (Mn) has an atomic number of 25 and a mass number of 55, according to the periodic table. This also means that sum of the total number of protons and neutrons is 55.
There is 1 question to complete.