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).
Beluga whales mate in the spring, usually in March or April, in small bays and estuaries. Gestation lasts about 14-15 months, and calves are born between March and September, mostly between May and July. Females give birth to single calves every two to three years on average.