Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Periodic Table
What is the name of the 87th element on the periodic table that has no known biological role because it has a half-life of only 22 minutes?
1
Francium
2
Dubnium
3
Seaborgium
4
More than one of the above
5
None of the above