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a group of very reactive chemical elements that readily lose their one valence electron to form...
a group of metallic elements that have two electrons in their outer shells and react easily with...
group or organic hydrocarbons, having single bonds between carbon atoms.
a group of organic compounds in which a halogen has replaced a hydrogen atom.
a group of organic compounds having a triple bond between two carbons.
All objects near the surface of the Earth fall with a constant acceleration of