What is the structure of Covid?

What is the structure of Covid? It requires advanced understanding of geomtry, trigonometry, calculus, amino acids, organic chemistry, biochemistry, and various other knowledge areas.

07/31/15

Which element has a greater reactivity and why?

Sulfur= 16 protons It is in Group 6 on Periodic table.   Calcium= 20 protons It is in Group 2 on periodic table.

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