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mass no. of an element is 81.if no. of neutrons is 31.7%more than no. of protons.Find its symbol.
mass no. of an element is 81.if no. of neutrons is 31.7%more than no. of protons.Find its symbol.
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Shivanshu
25 Oct
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Shruti
14 Aug
Number of protons +Number of neutrons = mass number = 81
Let the number of protons = x
Number of neutrons = x131.7/100 = 1.317x
X+1.317x = 81
X = 35
So, atomic number = 35
Element with atomic number 35 =Br
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