Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element and oxidizing agent that readily forms compounds (notably oxides) with most elements. Photosynthesis releases oxygen, and respiration consumes oxygen.xygen constitutes 49.2% of the Earth's crust by mass and is the major component of the world's oceans (88.8% by mass). Oxygen gas is the second most common component of the Earth's atmosphere, taking up 20.8% of its volume and 23.1% of its mass (some 10 15 tonnes).
The River Liffey (Irish: An Life) is a river in Ireland, which flows through the centre of Dublin.
The climate of Dublin in october is tolerable. the weather in Dublin in october is wet (with 106mm of rainfall over 12 days). The weather's not getting better compared to the previous month since in september there is an average of 83mm of precipitation over 10 days. The climate is rather fresh in that locality october, but it is livable when dressing warm.