1 Routine screening of average-risk women should begin at age 50, instead of age 40. 2  Routine screening should end at age 74. 3  Women should get screening mammograms every two years instead of every year.4  Breast self-exams have little value, based on findings from several large studies. Routine screening of average-risk women should begin at age 50, instead of age 40. 2  Routine screening should end at age 74. 3  Women should get screening mammograms every two years instead of every year.
in chemical compound: Alkynes. Molecules that contain a triple bond between two carbon atoms are known as alkynes. The triple bond is made up of one Ï bond and two Ï bonds. As in alkenes, the Ï bonds constitute regions of increased electron density lying parallel to the carbon-carbon bond axis.
What is the iupac name of alkyne with formula c2h2? Ethyne is the proper Iupac name for C2H2 which is more commonly known as acetylene. Eth is from the prefix for the two carbon system and yne is the suffix for a hydrocarbon thâ¦at contains at least one carbon to carbon triple bond. Making the world better, one answer at a time.