A simple cation (obtained from a single atom) takes its name from the name of the element. 3. A simple anion (obtained from a single atom) is named by taking the first part of the element name (the root) and adding the letters IDE. 4. Write the name for the compound by combining the names of the ions.
1 Blue whales give birth after 11 â 12 months of pregnancy and it is estimated that female whales give birth every 2 â 3 years.  killer whale have a pregnancy period of 15 â 18 months, however it is believed that the average pregnancy period is about 17 months. (Females killer whales give birth every 3 â 5 years).
Gestation Periods of Mammals. Gestation period is the time from fertilization to the actual birth in animals. In humans this period is 266 days or approximately 9 months. The shortest gestation period known in mammals is approximately 12 days.he longest gestation period known in mammals is that of the African elephant (Loxodonta Africana). These elephants carry their babies in the womb for about 660 days or 22 months. Camels and giraffes carry their babies for about 400 days.