explain what might have happened during planetary accretion to cause the earth to be depleted in light gases. Describe any supporting evidences.

Explainining a Non-Chondritic Silicate Earth

Table 2.6 (Rollinson,2007,p67) summarizes the difference between the composition of the silicate Earth and chondrites. For each group of elements, the table indicates whether the elements are depleted or enriched(relative to chondrite) in the silicate earth and briefly indicates the fractionation process that caused the difference.

Your task in this assignment is to expand on the fractionation process in each case . For example, you will explain what might have happened during planetary accretion to cause the earth to be depleted in light gases. Describe any supporting evidences.