4. At the time of Mendeleev, the number of elements known was
(a) 63
(b) 65
(c) 62
(d) 64
4. At the time of Mendeleev, the number of elements known was
(a) 63
(b) 65
(c) 62
(d) 64
Harshit Singh , 3 Years ago
Grade 12th pass
10 grade science> 4. At the time of Mendeleev, the number o...
1 AnswersPawan Prajapati
Last Activity: 3 Years ago
Answer: a
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