All Exams Test series for 1 year @ ₹349 only
Question

As per Mendeleev’s prediction, atomic mass of eka-aluminium was:

This question was previously asked in
SSC CGL 2024 (Tier-I) Previous Year Paper (17-Sep-2024) (Shift 3)
The correct answer is

68

Mendeleev predicted eka-aluminium (Gallium) would have:

  • Atomic mass ≈ 68
  • Actual discovered atomic mass of Gallium: 69.723
  • This demonstrated the power of his periodic table predictions

Correct Answer:

✔️ 3. 68

Mendeleev's predicted atomic mass for eka-aluminium was 68, very close to Gallium's actual atomic mass.

Was this answer helpful?
Need Expert Advice?
Upcoming Exams
SSC CPO
November 23, 2026
SSC CHSL
November 30, 2026
Test Series
SSC CGL img
SSC
SSC CGL (Tier I + Tier II) 2026 Mock Test Series - Latest Pattern
2509 Tests 6 Tests Free
8899 Attempts
4.2(945)
English, Hindi
More Questions from SSC CGL

Start Your Preparation with Prepp Mobile App

Download the app from Google Play & App Store
Download the app from Google Play & App Store
Prepp Mobile App