You most likely think that water together a problem that can put the end fires. However some facets are for this reason reactive the they burn in water. In fact, they virtually explode in water. An instance is shownin the picture below. Around 3 pounds of salt were included to water, and the result was one explosive reaction. Why is salt such a reactive element? In this section, friend will uncover out.

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Figure (PageIndex1): salt reacting through water.

The first Group

Sodium (left( ceNa ight)) is an facet in team 1 that the routine table that the elements. This team (column) the the table is displayed below. It has the nonmetal hydrogen (left( ceH ight)) and also six metals referred to as alkali metals. Elements in the same team of the periodic table have the same variety of valence electrons. These are the electron in the outer power level of the atoms that can be associated in lifwynnfoundation.orgistry reactions. Valence electrons determine plenty of of the nature of an element, so elements in the same team have comparable properties. Every the facets in group 1 have actually just one valence electron. This provides them very reactive.

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Figure (PageIndex2): team 1 the the periodic table.

Reactivity of group 1 Elements

Hydrogen is a really reactive gas, and the alkali steels are even an ext reactive. In fact, they are the many reactive metals and, in addition to the aspects in team 17, room the most reactive of every elements. The reactivity of alkali metals rises from the height to the bottom of the group, so lithium (left( ceLi ight)) is the least reactive alkali metal and also francium (left( ceFr ight)) is the many reactive. Due to the fact that alkali metals are so reactive, castle are uncovered in nature just in mix with various other elements. They often combine with team 17 elements, which are an extremely "eager" to get an electron.


Other properties of Alkali Metals

Besides being very reactive, alkali steels share a variety of other properties:

Alkali metals are all solids at room temperature. Alkali steels are low in density, and also some of castle float ~ above water. Alkali steels are fairly soft. Part are even soft enough to reduced with a knife, favor the sodium pictured in the number 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 atom of every elements. Pure hydrogen is a colorless, odorless, tasteless gas the is nontoxic yet highly flammable. Hydrogen gas exists greatly as diatomic ("two-atom") molecule (left( ceH_2 ight)), as displayed above. Hydrogen is the many abundant element in the universe and also the 3rd most abundant aspect on Earth, and occurs largely in compound such together water.most reactive elements on the periodic table