What is the difference between the number of neutrons in an atom of iridium, Ir, with a mass number of 193, and the number of neutrons in an atom of plutonium, Pu, with a mass number of 244?

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation:

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

carbon atoms, hydrogen, oxygen, and nitrogen.