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a group of metallic elements that have two electrons in their outer shells and react easily with other elements. Group 2 in the periodic table.
a polymerisation reaction is terminated by any reaction that uses up the radicals.
mass per unit volume of a substance. The number of molecules in a particular area or a measure...
a vertical column of elements in the periodic table which have similar properties.
heterogeneous mixture of solid particles mixed with a liquid. The solid does not dissolve in the...