You most likely think of water as a problem that deserve to put the end fires. But some elements are for this reason reactive the they burn in water. In fact, they practically explode in water. An example is shownin the picture below. About 3 pounds of sodium were included to water, and the result was an explosive reaction. Why is sodium such a reactive element? In this section, girlfriend will find out.

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Figure (PageIndex1): sodium reacting with water.

The an initial Group

Sodium (left( ceNa ight)) is an aspect in group 1 the the periodic table that the elements. This team (column) the the table is shown below. It has the nonmetal hydrogen (left( ceH ight)) and six metals dubbed alkali metals. Elements in the same team of the periodic table have actually the same variety of valence electrons. These space the electrons in the outer power level that the atoms that deserve to be connected in benidormclubdeportivo.orgical reactions. Valence electrons determine plenty of of the nature of one element, so elements in the same team have comparable properties. Every the elements in group 1 have actually just one valence electron. This renders them very reactive.

Figure (PageIndex2): group 1 the the regular table.

Reactivity of group 1 Elements

Hydrogen is a really reactive gas, and the alkali metals are even more reactive. In fact, they space the most reactive metals and, together with the aspects in team 17, space the most reactive of every elements. The reactivity that alkali metals increases from the height to the bottom the the group, therefore 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 steels are so reactive, lock are uncovered in nature only in combination with various other elements. They often combine with team 17 elements, which are an extremely "eager" to gain an electron.

Other nature of Alkali Metals

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

Alkali steels are all solids in ~ room temperature. Alkali metals are short in density, and also some of lock float on water. Alkali metals are reasonably soft. Part are also soft sufficient to reduced with a knife, favor the salt 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 actually the smallest, lightest atoms of every elements. Pure hydrogen is a colorless, odorless, tasteless gas the is nontoxic however highly flammable. Hydrogen gas exists largely as diatomic ("two-atom") molecule (left( ceH_2 ight)), as presented above. Hydrogen is the most abundant facet in the universe and the third most abundant aspect on Earth, and occurs mostly in link such together water.what is the most reactive group of metals