Covalent interactions (bonds) hold atoms together within molecules. Covalent bonds are strong, with enthalpies are on the order of 100 kcal/mole (400 kjoule/mole). Covalent bonds break during chemical reactions, as during the burning of paper.
Public bodies reports. Public bodies 2014 provides a directory of data on non-departmental public bodies (. ), executive agencies and non-ministerial departments (NMDs), as well as summary information on the size and expenditure of these bodies and information on public appointments.
For other uses, see Body (disambiguation) . A body is the physical material of a person or organism. It is only used for organisms which are in one part or whole. There are organisms which change from single cells to whole organisms: for example, slime moulds.