Q. 123.9( 17 Votes )

In Mendelee

Answer :

Because the properties of cobalt were similar to those of rhodium (Rh) and iridium (Ir) (same group) and the properties of nickel were similar to those of palladium (Pd) and platinum (Pt) (same group). So cobalt with atomic mass of 58.93 amu was placed before nickel having an atomic mass of 58.71 amu.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Reflection of light-2Reflection of light-2Reflection of light-238 mins
Purification of MetalsPurification of MetalsPurification of Metals60 mins
Extraction of MetalExtraction of MetalExtraction of Metal56 mins
Heating Effect of Electric CurrentHeating Effect of Electric CurrentHeating Effect of Electric Current40 mins
Outcomes of DemocracyOutcomes of DemocracyOutcomes of Democracy43 mins
Refraction of Light-2Refraction of Light-2Refraction of Light-241 mins
Application of Trigo Important QuestionsApplication of Trigo Important QuestionsApplication of Trigo Important Questions44 mins
Trigonometric Ratios of Specified AnglesTrigonometric Ratios of Specified AnglesTrigonometric Ratios of Specified Angles38 mins
Sum of n Terms of APSum of n Terms of APSum of n Terms of AP56 mins
Chemical Properties of Metal and Non MetalChemical Properties of Metal and Non MetalChemical Properties of Metal and Non Metal61 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

(a) The modern peScience - Board Papers

<span lang="EN-USScience - Board Papers

What were the limLakhmir Singh & Manjit Kaur - Chemistry

Would you place tLakhmir Singh & Manjit Kaur - Chemistry

Name two elementsLakhmir Singh & Manjit Kaur - Chemistry

The correct formuLakhmir Singh & Manjit Kaur - Chemistry