Finasteride is in a class of medications called 5-alpha reductase inhibitors. Finasteride treats BPH by blocking the body's production of a male hormone that causes the prostate to enlarge. Finasteride treats male pattern hair loss by blocking the body's production of a male hormone in the scalp that stops hair growth.
The electron. It is found within energy levels called orbits. They are denoted by K,L,M,N,O,...... The electron. It is found within energy levels called orbits. They are denoted by K,L,M,N,O,......
1 When the third energy level has 8 electrons, the next 2 electrons go into the fourth energy level. 2  The electrons in the energy level farthest from the nucleus are called valence electrons. 3  Atoms in the same column (group) in the periodic table have the same number of valence electrons.