The outermost shell of a fluorine atom is almost full. how many electrons are in this shell? a.1 b.4 c.7 d.15

Which of the rock examples below is most likely to be metamorphic

9. the history of life on earth is recorded in

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen