Which of the following has the shortest half life?
carbon-14
uranium-235
uranium-238
carbon-12

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

How many grams of n2h4 will be consumed by 23 g of n2o4

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li