A. several military colleges would be the answer
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
Wheee are the examples????
•balance of powers
•scramble of africa
•nationalism