Alkaline Earths

1. Magnesium is used in the manufacturing of lightweight alloys for aircraft and automotive parts.
2. Calcium is essential for bone health and is used in dietary supplements to support bone density.
3. Barium compounds are used in medical imaging techniques like barium enemas and barium swallow tests to visualize the gastrointestinal tract.

Magnesium is a soft metal: the Mohs hardness is approx. 2.

Reactivity increase down the group.Ceasium is the most reactive.

In general, alkaline earths are very reactive and all have a valency of +2. They will thus combine with one oxygen or two halogen atoms etc.

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Calcium is the most chemically active alkaline earth metal because it has a relatively low ionization energy compared to its group counterparts, which allows it to easily lose its two valence electrons. This property makes calcium more reactive, particularly with water and acids, leading to the formation of hydroxides and salts. Additionally, its larger atomic size compared to beryllium and magnesium results in a weaker attraction between the nucleus and the valence electrons, further enhancing its reactivity.

the group number

Alkali and alkaline earth metals easily form cations because they have low ionization energies and readily lose electrons to achieve a stable electron configuration. This results in the formation of positively charged ions (cations) with a noble gas electron configuration, which is energetically favorable.

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Carbides of beryllium and aluminium are called methanides because they react with methane gas to form compounds. These carbides have the ability to react with methane in a way that is similar to other metal carbides, which is why they are classified as methanides.

Group 2 metals are classified as alkaline earth metals because they share similar properties: they are shiny, silvery-white, relatively reactive metals with two electrons in their outer shell. They react with water to form alkaline solutions and are generally less reactive than the alkali metals in Group 1.

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Alkaline-earth metals are less reactive compared to alkali metals, but they still react with water and oxygen to form oxides and hydroxides. They are more reactive than transition metals but less reactive than alkali metals.

No. The alkali and alkaline earth metals are very reactive.

Solid as their lowest boiling point is 1110 degrees-Celsius and (highest) melting point is 714 degrees-Celsius. This means that at less that 714 degrees-Celsius, which room temperature falls under, it is SOLID. :D Hope that helped.

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They react with water like the alkaline metal but does not change or melt with fire.
The alkaline part of the name comes from the fact that these metal form alkaline solutions, when they react with water. The earth part was added to differentiate these from the group one metals. Alchemists called them earth metals because they though that their oxides were new elements.
In the middle age the oxides of these metals (metals which are not known in time) are called alkaline earths: alkalinebecause these oxides react with water forming an alkaline solution and earths because in the past non-metallic compounds were called earths.

They are shiny, silver, less malleable than alkali metals and they burn with bright flames. They also make strong bases (Opposite of acid).

If you are in the same chem textbook as I am, (Chemistry, Connections to Our Changing World, from 1997) then the answer can be found on pg. 195, a page before the aforementioned question. If you aren't using this textbook, here's a summery of what it says: Magnesium and aluminum can be combined to form an alloy, which is used in things like car wheels, aircraft, tools, and furniture. It doesn't react with cold water, but it does react with hot water or steam. Calcium carbonate is found in chalk, marble, and limestone.

Barium has the largest electron affinity among the alkaline earth metals.

Group 2