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A colourless, odourless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.
skābeklis, skābekļa molekula, homonuclear molekula, obligāciju struktūra, kovalento saiti, sigma saite, pi bond, dubultā saite, nepolāra, dzīves apstākļi, elpošana, gaiss, sadedzināšana, oksīds, eksotermisks, fotosintēze, Neorganiskā ķīmija, ķīmija
The oxygen cycle describes the movement of oxygen within its three main reservoirs.
An allotrope of oxygen, consisting of 3 oxygen atoms.
The respiratory system is responsible for the intake of oxygen and the release of carbon dioxide.
The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for life on Earth.
Knallgas is the mixture of hydrogen and oxygen. It will explode when ignited.
Human blood consists of blood cells and plasma.
A yellow-green toxic gas with a strong odour, one of the halogens.
Smoking severely damages the respiratory system, it may cause COPD or lung cancer.
Hydrogen atoms within hydrogen molecules are held together by a covalent bond.
A fuel cell provides environment-friendly electric energy produced by the chemical reaction between oxygen and hydrogen.
Colourless, odourless, lighter-than-air gas. The most common chemical element in the universe.
The compound of hydrogen and oxygen. Colourless, odourless liquid; heavier than water.
A colourless, toxic gas with the characteristic odour of rotten eggs. It occurs in certain mineral waters and spring waters.
The presence of hydronium ions relative to hydroxide ions determines a solution´s pH.
A compound ion formed when a water molecule releases a proton.
Hypochlorite ions are formed when water is disinfected with chlorine.
A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.
A colourless, heavier-than-air gas, an intermediate in the production of nitric acid.
A reddish-brown toxic gas, very reactive due to its unpaired electron.
Plants are capable of converting inorganic substances (carbon dioxide and water) into organic sugar.
Candles have been used for lighting since ancient times.
Water is a very stable compound of hydrogen and oxygen, vital for all known forms of life. In nature it occurs in liquid, solid and gaseous state.
This scene presents the basic components of the human body.
The first member of the homologous series of alkyne hydrocarbons.
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