Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Basic Concepts of Chemistry
Which element of Group 17 has two isotopes of masses 35 and 37 amu with average abundance of 75.77% and 24.23%, respectively?
1
Chlorine
2
Iodine
3
Fluorine
4
More than one of the above
5
None of the above