- Physical Sciences
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 solid that forms as a product of the reaction between two aqueous solutions.
a group of atoms that are bonded together. It has an unequal number of protons and electrons and...
a bond formed when non-metal atoms share a pair of valence electrons to form a molecule.
the species that remains after an acid has donated a proton.