How many elements were known at the time of mendeleev?
Answers
Answered by
19
Answer:
at Mendeleev's time, 63 elements were discovered
Answered by
1
Answer:
63 elements
Mendeleev's periodic table consists of 9 groups and 7 periods. The horizontal rows are called periods and vertical columns are called groups. Thus, at Mendeleev's time, 63 elements were discovered
Similar questions