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Q. |
The umber of neutrons present in an element having mass number 226 and atomic number 88 is– |
A. | 88 |
B. | 138 |
C. | 314 |
D. | 50 |
Answer» B. 138 | |
Explanation: The mass number is a count of the number of particles in an atom's nucleus which is made up of protons and neutrons. In other words, Mass Number = Number of Protons + Number of Neutrons. The atomic number is the number of protons in an atom of an element, 226 = 88 + number of Neutrons. So, the number of neutrons= 226 - 88= 138. |
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