Four elements-chlorine (Cl), potassium (K), argon (Ar), and radium (Ra) according to the periodic table which of these elements has atoms with the most valence electrons?

A. Potassium

B. Chlorine

C. Radium

D. Argon

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.