Which species will have the strongest mass shift on a magnetic susceptibility balance?
-o2
-f2
-co
-no

O2 is the correct answer.

Explanation:

O2 species will have the strongest mass shift on a magnetic susceptibility balance because if the species is stronger paramagnetic, it will have a higher mass shift.

O2 species is paramagnetic, and oxygen atoms with two unpaired electrons are paramagnetic, unpaired electrons rotate in the same direction, which raises the magnetic field force that reason it will have the strongest mass shift on a magnetic susceptibility balance.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.