Each element has its unique properties, each contain a different number of protons and neutrons giving it its own atomic number and mass number
Explanation:
silver is (uncountable) a lustrous white metallic element, atomic number 47, atomic mass 10787 symbol ag while iron is (uncountable) a common. inexpensive metal often black in colour that rusts is attracted by magnets and used in making steel
The North Atlantic Treaty Organization was created in 1949 by the United States, Canada, and several Western European nations to provide collective security against the Soviet Union. ... After the destruction of the Second World War, the nations of Europe struggled to rebuild their economies and ensure their security.
