What element from the periodic table has the highest monetary value per unit

francium

Explanation:

The most expensive natural element is francium, but it decays so quickly it can't be collected to be sold. 

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.