Why is cobalt placed before nickel on the periodic table of elements even though it has a higher average atomic mass than nickel

Type the letter that represents the correct location for each particle type below.

The time that is taken by neptune once around the sun is called

In a chemical reaction, the final amount of the products is determined by the a. universal gas law b. law of definite proportions c. air pressure d. temperature e. none of the above me