That is the Sigma Symbol. It’s the addition of a sequence of numbers; the result is the sum of the total. if numbers are added sequentially from left to right, any intermediate result is a partial sum, prefix sum, or running total of the summation
In 2Cr2O7 there’s 2 items; Cr and O
Answer:
the ans will be because it has 1.672
The first organisms to live within a newly created patch of land are the Pioneer Species.
