- Physical Sciences
the transfer of electrons from one atom to another atom to form positive and negative ions that form an ionic substance (salt or ionic compound), hold together by electrostatic attraction.
a group of organic compounds where an oxygen atom has replaced two hydrogen atoms on an end...
the part of the atmosphere that extends to a height of 10 km above the surface of the Earth.
non-rechargeable cells, such as the zinc-carbon torch cell.
the natural circulation of water on, above or below the surface of the Earth.