It would be the same thing if the Co does not have a number with it because it can’t reduce
        
             
        
        
        
Answer:
stainless steel
Explanation:
stainless steel would heat up fast because it is made of metal
 
        
             
        
        
        
All of them are compounds.
        
             
        
        
        
Answer:
Length = 393pm, Density = 21.3 g/cm^3. 
Explanation:
From the question above, we have the following parameters or data which is going to aid in solving the above Question.
=> The radius of a platinum atom = 139 pm.
Therefore, the length can be calculated by making use of the formula given below: 
Length = 2 √( 2r) = 2 × √ (2 × 139 × 10^-12m ) = 393 × 10^-10 m = 393pm.
The density can be calculated by making use of the chemical formula given below: 
Density = mass ÷ volume = (195.064/ 6.02 × 10^23) ÷ (3.93 × 10^-10/ 10^-2) = 21.3 g/cm^3. 
 
        
             
        
        
        
True
Explanation:
Harry Hess in 1961 resurrected Wegener's continental drift hypothesis and also he mantle convection idea of Arthur Holmes by postulating the theory of sea floor spreading. 
- After Wegener's postulation of the continental drift hypothesis, not much was done. 
 - It was only around 1931 that Arthur Holmes came up with the idea of a convecting mantle.
 - After the second world war passed, new instruments were used to investigate and map the ocean floor. 
 - Through this, Arthur Holmes came up with the idea of a spreading sea floor. 
 - This gave a full gleam picture to the idea of a moving earth and the more accepted terminology of "Plate tectonics " came to the fore. 
 
Learn more: 
Sea floor spreading brainly.com/question/9912731
Continental drift brainly.com/question/5002949
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