KollegeApply
Search Colleges, Courses, Exams , Questions and Articles
Search
All Streams
All Courses
Engineering
Management
Medical
Design
Explore
Online
KollegeApply
Search Colleges, Courses, Exams , Questions and Articles
Search
Login
All Streams
All Courses
Engineering
Management
Medical
Design
Explore
Online
Home
/
Questions
/
How many elements were known when Mendeleev started his work?
Science
Periodic Classification of Elements
Question
Updated
19 Aug 2026
How many elements were known when Mendeleev started his work?
A
Choose Your Answer
A
100
B
215
C
65
D
80
🔓 Unlock Solution & Correct Answer
Reveal the step-by-step explanation
Ask Orbit AI