A nucleus of mass number 81 contains 46 neutrons
Mass number=number of protons+number of neutrons
81=number of protons+ 46
number of protons=81-46
number of protons=35
In an atom, number of electrons=number of protons=35
So, the element is ⁸¹Br₃₅ .
Atomic ion of Br, having 36 electrons in it will be:
⁸¹Br⁻₃₆
The symbol for this atomic ion will be Br and charge on the ion will be -ve.
List of covalent compounds
Binary molecular (covalent) compounds
compound systematic name
NO2 nitrogen dioxide
N2O3 dinitrogen trioxide
N2O4 dinitrogen tetroxide
N2O5 dinitrogen pentoxide
Answer:
The nucleus
Explanation:
The center of the atom is made up of the nucleus.
Answer:
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Explanation:
