- Physical Sciences
a substance in which the atoms are packed randomly.
this consists of three separate layers of the Earth â the crust, the mantle and the core.
the part of the atmosphere that extends to a height of 10 km above the surface of the Earth.
a chemical cell in which electrical energy from a battery is used to produce chemical reactions...
valence shell electron pair repulsion theory (VSEPR) is used to explain the shapes of molecules...