Chemical properties. Calcium is a moderately active element. It reacts readily with oxygen to form calcium oxide (CaO): Calcium reacts with the halogensâ fluorine, chlorine, bromine, iodine, and astatine, The halogens are the elements that make up Group 17 (VIIA) of the periodic table.
The bombing of Hiroshima and Nagasaki. On August 6, 1945 the US dropped an atomic bomb (Little Boy) on Hiroshima in Japan. Three days later a second atomic bomb (Fat Man) was dropped on the city of Nagasaki.These were the only times nuclear weapons have been used in war.Reasons for the bombing.Many reasons are given as to why the US administration decided to drop the atomic bomb on Hiroshima and Nagasaki. Reasons include the following: 1  The United States wanted to force Japan's surrender as quickly as possible to minimize American casualties.hese were the only times nuclear weapons have been used in war. Reasons for the bombing. Many reasons are given as to why the US administration decided to drop the atomic bomb on Hiroshima and Nagasaki.
Japan was being bombed with a nuclear bomb because they were at war with the United States. The U.S dropped two Atomic bombs on Japan, the first was on Hiroshima Monday August â¦ 6 1945 and the seconded one on Nagasaki Thursday August 9 1945.the bomb was dropped between this short three day period because before Germany had surrendered Stalin and Roosevelt met up and negotiated a proposition. Today's Battle: August 9, 1945-the bombing of Nagasaki The second atomic bomb dropped in combat was dropped 68 years ago today on the city of Nagasaki, Japan.