Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Periodic Table
The term 'triads' was used by ______________.
1
Johann Wolfgang Dobereiner
2
Henry Moseley
3
Mendeleev
4
More than one of the above
5
None of the above