| HYDROGEN | The simplest element; it combines with oxygen to make water. Each atom is made up of a single proton and a single electron. |
| SAFETYFACTOR | One of the matches is attracting an element - it concerns Homeland Security (6,6) |
| PLACEBO | Put boron with oxygen to make something inactive |
| ELEMENTALLY | Basically how hydrogen combines with oxygen |
| WELLS | Sources of water, each lending life succour (5) |
| HYDROGENATOMS | Simplest elements |
| COMBUSTION | Chemical process in which a substance reacts with oxygen to produce heat and light in the form of flame (10) |
| REGROUP | One cleaning up extra oxygen to make new order (7) |
| OXIDISE | Combine with oxygen |
| HADRAMAUT | Region in east-central Yemen, on the Gulf of Aden, made up of a hilly area near the coast and an inland valley occupied by a seasonal watercourse, the Wadi a¸¤aa¸ramawt, that runs parallel to the |
| SCENE | Subdivision of an act of a play; or, a sequence of action in a film made up of a series of shots (5) |
| EMMY | This statuette of a winged woman holding an atom is the symbol of the annual awards given by the Academy of Television Arts %26 Sciences, The ... |
| SCREW | This tool is usually made up of a circular cylindrical member with a continuous helical rib, used either as a fastener or as a force and motion modifier. The Greek scientist Archimedes developed one t |
| HAZE | It combines with smog to make "smaze" |
| ISOGAMETE | Reproductive cell similar to the one it combines with |
| SPRING | The one of the four seasons that combines with 'wood' in the name of a Blue Mountains town (6) |
| ELMS | Related to species including the wych and the winged wahoo, tall ulmaceous trees whose wood was used to make water pumps in English villages, as well as wagon wheels and Welsh longbows (4) |
| NEWTON | First to describe gravity whose discovery that white light is made up of a mixture of colours is described in his treatise Opticks (6) |
| ETHER | Any of a class of volatile liquid compounds in which an oxygen atom is bonded to two alkyl or aryl groups, commonly used as solvents (5) |
| ATOM | Unit of matter made up of a dense nucleus surrounded by a cloud of electrons (4) |
