You most likely think the water together a problem that can put the end fires. Yet some elements are therefore reactive that they burn in water. In fact, they virtually explode in water. An example is shownin the picture below. Around 3 pounds of salt were added to water, and the an outcome was an explosive reaction. Why is salt such a reactive element? In this section, friend will uncover out.

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Figure (PageIndex1): sodium reacting v water.

The an initial Group

Sodium (left( ceNa ight)) is an element in team 1 that the routine table the the elements. This group (column) the the table is presented below. It consists of the nonmetal hydrogen (left( ceH ight)) and six metals referred to as alkali metals. Elements in the same team of the periodic table have the same number of valence electrons. These space the electron in the outer energy level that the atom that deserve to be affiliated in rebab.netistry reactions. Valence electron determine plenty of of the properties of one element, so aspects in the same team have similar properties. Every the facets in team 1 have actually just one valence electron. This renders them very reactive.

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Figure (PageIndex2): team 1 of the regular table.

Reactivity of team 1 Elements

Hydrogen is a very reactive gas, and also the alkali metals are even more reactive. In fact, they space the most reactive steels and, along with the elements in group 17, room the most reactive of all elements. The reactivity of alkali metals rises from the height to the bottom the the group, for this reason lithium (left( ceLi ight)) is the least reactive alkali metal and francium (left( ceFr ight)) is the most reactive. Due to the fact that alkali metals are therefore reactive, they are discovered in nature just in combination with other elements. Lock often integrate with team 17 elements, which are very "eager" to acquire an electron.


Other nature of Alkali Metals

Besides being an extremely reactive, alkali metals share a variety of other properties:

Alkali metals are every solids at room temperature. Alkali metals are low in density, and also some of castle float on water. Alkali steels are reasonably soft. Part are even soft enough to reduced with a knife, like the sodium pictured in the figure below.

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api/deki/files/78133/CK12_Screenshot_6-9-4.png?revision=1&size=bestfit&width=406&height=238" />Figure (PageIndex4): Hydrogen has the smallest, lightest atoms of every elements. Pure hydrogen is a colorless, odorless, tasteless gas that is nontoxic yet highly flammable. Hydrogen gas exists greatly as diatomic ("two-atom") molecules (left( ceH_2 ight)), as presented above. Hydrogen is the many abundant element in the universe and also the 3rd most abundant aspect on Earth, and also occurs mostly in link such as water.most reactive metal in periodic table