who introduced the table mentioned above?
Russian chemist Dmitri Mendeleev
Periodic table
Russian chemist Dmitri Mendeleev published the first recognizable periodic table in 1869, developed mainly to illustrate periodic trends of the then-known elements.
what do the alternating bands of jupiter suggest the presence of The zones' lighter color is believed to result from ammonia ice; what gives the belts their darker colors is uncertain. what is it composed of? It is mostly made of molecular hydrogen and helium in roughly solar proportions. what can you tell me about its structure? The atmosphere is classified into four layers: the troposphere, stratosphere, thermosphere and exosphere; the planet does not have a solid surface, and the lowest atmospheric layer, the troposphere, smoothly transitions into the planet's fluid interior. what is the symbol of the second chemical component mentioned above? 'He' when was it initially discovered? 1868 where is it placed in the periodic table? It is  the first in the noble gas group in the periodic table. what is it used for? It is used as a breathing gas - helium mixtures such as trimix, heliox and heliair are used for deep diving to reduce the effects of narcosis, which worsen with increasing depth. where is it abundantly found? It is the second most abundant element in the known Universe, constituting 23% of its baryonic mass. does it cause any hazards? Inhaling helium can be dangerous if done to excess, since helium is a simple asphyxiant and so displaces oxygen needed for normal respiration. how is it extracted? For large-scale use, it is extracted by fractional distillation from natural gas, which can contain as much as 7% helium.
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Periodic table [SEP] Introduction
Numerous synthetic radioisotopes of naturally occurring elements have also been produced in laboratories. The organization of the periodic table can be used to derive relationships between the various element properties, and also to predict chemical properties and behaviours of undiscovered or newly synthesized elements. Russian chemist Dmitri Mendeleev published the first recognizable periodic table in 1869, developed mainly to illustrate periodic trends of the then-known elements. He also predicted some properties of unidentified elements that were expected to fill gaps within the table. Most of his forecasts soon proved to be correct, culminating with the discovery of gallium and germanium in 1875 and 1886 respectively, which corroborated his predictions.