The alkaline earth metals are six chemical elements in column (group) 2 of the Periodic table.They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).They have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.hey are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.
Female killer whales reach sexual maturity when they grow to about 15-18 feet (4.6 m-5.4 m) long, depending on geographic region. The gestation period for killer whales varies from 15-18 months. Birth may take place in any month--there is no distinct calving season. Calves are nursed for at least 1 year, and may be weaned between 1-2 years old. The birth rate for killer whales is not well understood, but, in some populations, is estimated as every 5 years for an average period of 25 years. Killer whales are highly social animals that occur primarily in relatively stable social groups that often range in size from 2 to 15 animals.
How do killer whales have their young? Killer whale males reach breeding age when they are around 22 feet (6.7 meters) long while females can breed when they are about 16 feet (4.9 meters) long.emale killer whales can grow up to 26 feet (7.9 meters) with a 3 foot dorsal fin while males are larger than the females growing up to 28 feet (8.5 meters) with a 6 foot (1.3 meters) dorsal fin. Killer whales have 48 to 52 teeth that are large and conical shaped as well as slightly curved back and inward.