Question

Electronic configuration of Bromine is 2, 8, 18, 7.


a) What will be the number of neutrons in Bromine if its mass number is 80?

b) Identify the group and period to which Bromine belongs.

c) Which of the following elements show chemical reactions similar to bromine?

Element X (atomic number 9), Element Y (atomic number 15).​

Answer 1

Answer:

Here , no.of proton = no. of electron = 35

a) Atomic mass= No.of proton + no. of neutrons

80= 35 + x

x = 45

b) Group 17 and period 4

c)Fluorine , Chlorine , Iodine