Ais two or more atoms joined together.
a) cell
b) tissue
c) molecule
d) particle

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

What electron configurations do atoms usually achieve by sharing electrons to form covalent bonds?