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Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma).A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture, such as air, contains a variety of pure gases. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer.
The gaseous state of matter occurs between the liquid and plasma states, the latter of which provides the upper temperature boundary for gases. Bounding the lower end of the temperature scale lie degenerative quantum gases which are gaining increasing attention.
High-density atomic gases super-cooled to very low temperatures are classified by their statistical behavior as either Bose gases or Fermi gases. For a comprehensive listing of these exotic states of matter see list of states of matter.

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  1. Anonymous99

    Looking for a gas engineer

    Hi, I'm looking for a gas engineer who I can work with so I can complete my portfolio. I have done level 2 and 3 tech cert along with bpec gas foundation and in order to progress to ACS, I have to finish my portfolio. I also want to learn plumbing along with gas so I can learn more things. I...
  2. N

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  3. D

    URGENT Gas Boiler Leaking Yellow Water

    2 of my properties tenants have notified me that their boilers are leaking yellow water, i need someone ASAP since that Rubbish is disgusting and i cant let them live off like that. Water heating is fine tho, i am prepared to pay anything just get here asap post code is TA5
  4. K

    One burner on gas hob not working

    How would you classify this for a LL cert?
  5. T

    Sewer gas smell from shower 10am daily.

    For about a year, my shower on a third floor is giving an on off gas smell sometimes after a shower and particularly in the morning not long after the sun rises enough to hit our roof. I usually run some water into my p-trap and the smell goes away after a few minutes. There is a tub right...
  6. irishwildman

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  7. C

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  8. B

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  9. dilligaf

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  10. ian.

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  11. S

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  12. M

    Looking for a commercial gas engineer

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  13. O

    Training to become a gas engineer in my own time?

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  14. F

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  15. P

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    Hello, We live in an 18 year old town house on three floors and have lived here from new. We changed the downstairs cloakroom and the family bathroom on the middle floor. Since then there has been a terrible smell of sewer gas in the house. This is not localised to the bathroom alone, it...
  16. Jamro91

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  17. F

    New Career - Gas Safe

    Hi, need your honest views if you would be so kind. I’m 48 and work for the NHS (office based) and earn 44k a year. Ive been do fustrated and fed up in my work for so long that I’ve enrolled to do my gas safe and become an engineer. I know it’s hard work but I’m really excited and I’d love to...
  18. G

    Commercial Gas Engineers Required - Various locations - South England

    We are looking for Commercial Gas Engineers to join a Major company on various projects around South of England primarily working on Gas Service / Mains replacement activities. Excellent Salary and Benefits, permanent position. Relocation payment can be discussed. Please get in touch if...
  19. I

    Recent gas engineer wanting to gain lpg lav qualification?

    Please can anyone help or point me in the right direcrion. I have recently completed a 18 month bpec management learning programme (apprenticeship) I am now qualified in CCN1, CENWAT, MET1, Unvented, CONGLP1PD. I need to get my CONGLP1-LAV as that is the work I am hoping to predominately do...
  20. J

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