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-238 mins
Purification of Metals60 mins
Extraction of Metal56 mins
Heating Effect of Electric Current40 mins
Outcomes of Democracy43 mins
Refraction of Light-241 mins
Application of Trigo Important Questions44 mins
Trigonometric Ratios of Specified Angles38 mins
Sum of n Terms of AP56 mins
Chemical Properties of Metal and Non Metal61 mins
Reflection of light-238 minsPurification of Metals60 minsExtraction of Metal56 minsHeating Effect of Electric Current40 minsOutcomes of Democracy43 minsRefraction of Light-241 minsApplication of Trigo Important Questions44 minsTrigonometric Ratios of Specified Angles38 minsSum of n Terms of AP56 minsChemical Properties of Metal and Non Metal61 minsTry our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
view all courses
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
RELATED QUESTIONS :
(a) The modern pe
Science - Board Papers<span lang="EN-US
Science - Board PapersWhat were the lim
Lakhmir Singh & Manjit Kaur - ChemistryWould you place t
Lakhmir Singh & Manjit Kaur - ChemistryName two elements
Lakhmir Singh & Manjit Kaur - ChemistryThe correct formu
Lakhmir Singh & Manjit Kaur - Chemistry