{"id":7577,"date":"2018-04-24T15:49:19","date_gmt":"2018-04-24T15:49:19","guid":{"rendered":"https:\/\/www.experimentoscientificos.es\/?page_id=7577"},"modified":"2021-03-07T10:17:03","modified_gmt":"2021-03-07T10:17:03","slug":"sodio","status":"publish","type":"page","link":"https:\/\/www.experimentoscientificos.es\/en\/sodio\/","title":{"rendered":"Sodium"},"content":{"rendered":"

The element sodium<\/strong> is the 11th element of the Periodic Table<\/a>. From chemical formula Na<\/strong>sodium is a metal of the first group, the alkali metals. It is a soft metal and is very abundant in nature, being found as an ion in sea salt. Like all alkali metals, it is very reactive, oxidising in the presence of oxygen and reacting violently with water.<\/p>\n

SODIUM ATOM<\/h2>\n

The atom<\/a> The sodium atom consists of 11 protons and 12 neutrons in the nucleus. Around the nucleus of the sodium atom, 11 electrons circulate, which cover the energy levels<\/a> (2 electrons in the first level, 8 in the second level and 1 single electron in the last level). This last electron is easily lost, so the chemical charge of sodium when bonded to another element is +1.<\/p>\n

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PHYSICO-CHEMICAL PROPERTIES OF SODIUM<\/h2>\n

Atomic mass:\u00a0<\/strong>22.98976928(2) u
\n<\/strong>Density<\/a>:<\/strong> 968 kg\/m3
\nAtomic radius (calc)<\/strong>: 190 pm (Bohr radius)<\/p>\n

Group, period, block:<\/strong>\u00a01, 3, s
\nName, symbol, number:<\/strong>\u00a0Hydrogen, H, 1
\nOrdinary status:<\/strong>\u00a0Solid
\nMelting point<\/a>:<\/strong> 370.87 K (98 \u00b0C)
\nBoiling point<\/a>: <\/strong>1156 K (883 \u00b0C)
\nSpecific heat<\/a><\/strong>: 1230 J\/(K-kg)
\nn\u00baCAS: <\/strong>7440-23-5
\n<\/strong> EINECS no:\u00a0<\/strong>45.63<\/p>\n

SODIUM EXPERIMENTS<\/h2>\n

Sodium, reacts violently with water, forming the compound <\/p>\n

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or sodium hydroxide, thus rendering the water highly alkaline, with a ph<\/a> very high.<\/p>\n

Simply dropping a piece of sodium metal into water and watching the reaction is in itself a very colourful chemistry experiment.<\/p>\n