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The atomic number of an atom is 10 and its mass number is 21. How many protons,neutrons, and electrons does the atom have? |
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Answer» Answer: no. of protons = 10 , no. of ELECTRONS = 10 and no. of neutrons = 11 Step-by-step explanation: The ATOMIC number of an atom REPRESENTS the no. of protons in it and in a NEUTRAL atom no. of protons and electrons will be equal, HENCE no. of protons = no. of electrons = 10 and in an atom, total no. of protons + total no. of neutrons = Mass Number, So, no. of neutrons= 21-10 = 11 |
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