1.

Nitrogen atom has an atomic number of 7 and oxygen has an atomic number 8.The total number of electrons in a nitrate ion will be

Answer»

8
16
32
64

Solution :Numbers of electrons in nitrogen =7 and number of electron is oxygen =8 we know that formula of nitrate ion is `NO_3^-` we ALSO know that number of electron =(1 x Number of electrons in nitrogen ) + ( 3 x number of electrons in oxygen ) +1
=(1 x 7) + (3 x 8) + 1 =32


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