Chemistry

3. an ionized gas consisting of positive ions and free electrons in proportions resulting in more or less no overall electric charge, typically at low pressures (as in the upper atmosphere and in fluorescent lamps) or at very high temperatures (as in stars and nuclear fusion reactors).
5. transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase
7. bond electrostatic attraction between polar molecules that occurs when a hydrogen (H) atom bound to a highly electronegative atom such as nitrogen (N), oxygen (O) or fluorine (F) experiences attraction to some other nearby highly electronegative atom
9. forces of attraction or repulsion which act between neighboring particles
10. substances are heated, the molecular bonds between their particles are weakened, and the particles move faster, causing the substance to expand.
11. having a consistency like that of water or oil, i.e., flowing freely but of constant volume.
12. great amounts of space
15. states that the rate of effusion
18. the weakest intermolecular force
21. solids with atoms,ions,or molecules arranged orderly
23. equal to 760 mm Hg or 101.3 kilopascals

1. the reduction in volume (causing an increase in pressure) of the fuel mixture in an internal combustion engine before ignition.
2. intermolecular forces that exist between polar molecules
4. solids which particles are not arranged in a regular pattern
6. firm and stable in shape; not liquid or fluid.
8. the curved upper surface of a liquid in a tube.
9. that holds together the atoms making up a molecule or compound.
13. instruments used to measure atmospheric air pressure
14. measure the resistance of a liquid to flow
15. an airlike fluid substance which expands freely to fill any space available, irrespective of its quantity
16. Compounds that lower the surface tension of water
17. each of two or more different physical forms in which an element can exist
19. equal to a force of one Newton per square meter
20. smallest arrangment of atoms in a crystal lattice
22. Tension energy required to increase the surface area of a liquid