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).
Some seal species give birth after 330 days, fairly similar to horses. Tapirs and rhinoceroses, moderately close relatives of equines, have even longer gestations. Tapirs have pregnancies of 440 days, while the African rhinoceros has a 480-day gestation. Large animals with much shorter gestation periods include tigers (103 days), reindeer (225 days), moose (240 days), and bison (270 days). Those with considerably longer pregnancies are camels (410 days) and giraffes (425 days).