What are alkaline earth metals? Foods with alkaline earth metals

In the high school lecture hall, students were acquainted with earth control metal in Chemistry. However, that information only stops at basic knowledge, just for the purpose of giving a brief introduction to students. So What is earth control metal?? What elements, compounds, and uses do they include? What are the alkaline foods and should we eat more of them? Let’s read this article to better understand all of that!

Alkaline earth metal
Alkaline earth metal

What are alkaline earth metals?

First of all, in terms of position on the periodic table, alkaline earth metals belong to group IIA, which is one cycle after the alkali metals. Alkaline earth metals in chemistry include 6 elements, respectively: Beryllium (Be), Calcium (Ca), Strontium (Sr), Magnesium (Mg), Barium (Ba) and Radi (Ra). These elements have the basic characteristics of electron configuration, atomic radius, ionization energy I2, electronegativity, standard electrode potential and crystal lattice, respectively, as follows:

Element Beige Mg Shift Sr Father
Electron Configuration [He]2s2 [Ne]3s2 [Ar]4s2 [Kr]5s2 [Xe]6s2
Atomic Radius (nm) 0.089 0.136 0.174 0.191 0.220
Ionization energy I2 (kJ/mol) 1800 1450 1150 1060 970
Electronegativity 1.57 1.31 1.00 0.95 0.89
Standard electrode potential E◦M2+/M(V) -1.85 -2.37 -2.87 -2.89 -2.90
Crystal lattice Six directions Six directions Cubic center face Cubic center face Cubic center of mass
What are alkaline earth metals?
What are alkaline earth metals?

There are some special points of special note about alkaline earth metals, that is, if and only if an alkaline earth metal compound contains a Be component, then only then is the bond between Be and the elements The other is a covalent bond. In addition, the elements Ca, Sr, Ba and Ra of alkaline earth metal has the characteristic that only one compound can be formed: an ionic compound.

In terms of physical properties of alkaline earth metals, alkaline earth metals have a silvery white or light gray color. More specifically, the physical properties of the elements alkaline earth metal about melting point, boiling point, density and hardness will be shown in the following table, respectively:

Element Beige Mg Shift Sr Father
Melting temperature (◦C) 1280 650 838 768 714
Boiling point (◦C) 2770 1110 1440 1380 1640
Density (g/cm3) 1.85 1.74 1.55 2.6 3.5
Hardness (take diamond = 10) 2.0 1.5 1.8

From the data in the table above, it can be clearly seen that, with the exception of Be, almost all the elements of the alkaline earth metals have relatively low melting and boiling points and do not vary in one direction. any specific. In addition, although harder than alkali metals, alkaline earth metals still have a relatively low hardness, in order of decreasing hardness, respectively Be, Mg, Ca, Sr and finally Ba. And with the exception of Ba, most elements of the alkaline earth metals have a relatively small density, much lighter than aluminum.

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In terms of chemical properties of alkaline earth metals, alkaline earth metals are strong reducing agents, but still weaker when compared to alkali metals. It is possible to arrange the elements in order of increasing reduction of Be, Mg, Ca, Sr and finally Ba. Alkaline earth metals have chemical reactions when reacting with nonmetals, acids and water.

Considering in reality daily life, alkaline earth metals have many applications such as: as an additive to make alloys with high elasticity, no corrosion (Be); used as a reducing agent to separate oxygen and sulfur from steel; used to synthesize many organic compounds, etc. To prepare alkaline earth metals for those purposes, the most basic method is electrolysis of molten salts of compounds that exist in the form of M2+ ions. There are two chemical equations for this method, which are:

  • CaCl2 → Ca + Cl2↑
  • MgCl2 → Mg + Cl2↑

The second method that can be used is to use coke to reduce MgO, CaO, …, this method is less commonly used.

Compounds of alkaline earth metals

The alkaline earth metals have the basic compounds listed in the table below:

Beryli Magnesia Calcium Strontium Bari
Oxide Leopard MgO High SrO Bag
Hydroxide Be(OH)2 Mg(OH)2 Ca(OH)2 Sr(OH)2 Ba(OH)2
Fluoride BeF2 MgF2 CaF2 SrF2 BaF2
Chloride BeCl2 MgCl2 CaCl2 SrCl2 BaCl2
Sulfates BeSO4 MgSO4 CaSO4 SrSO4 BaSO4
Carbonate BeCO3 MgCO3 CaCO3 SrCO3 BaCO3
Nitrates Be(NO .)3)2 Mg(NO3)2 Ca(NO3)2 Sr(NO .)3)2 Three(NO .)3)2
Sulfide BeS MgS Case SrS BaS

In addition, alkaline earth metals also have other compounds such as:

  • Calcium oxalate (CaC2O4) is the main component of kidney stones
  • Calcium carbide (CaC2) used in the production of Acetylene, desulfurization from raw metals, etc.
  • Calcium cyanide (CaCN2) used as fertilizer

Foods containing alkaline earth metals

Alkaline foods that you should use

Alkaline earth metals found everywhere, even in food. So what foods contain alkaline earth metal? In descending order of alkalinity, those foods will be listed in turn as follows.

First, it is impossible not to mention fruits such as lemon, mango, watermelon, grapefruit, papaya or clean water, alkaline ionized water to balance the body. In addition, almost all foods in the group of vegetables, tubers and fruits are highly alkaline foods. For example asparagus, broccoli, onion, garlic, spinach, spinach, parsley, all of which are extremely alkaline foods.

Olive oil
Olive oil is an alkaline mine for the body

Oils like olive oil are also an “alkaline mine” for the body. Therefore, olive oil is the type of oil that you should prioritize for fried and fried foods in daily meals.

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Sweeteners such as maple syrup, rice syrup and fruits such as figs, melons, kiwis, pears, grapes, apples, and strawberries are less than the foods mentioned above but also contain a relatively large amount of alkali. . In particular, these foods are sweeter, tastier and more appealing than the foods listed at the beginning. Readers who love sweets, please eat a lot of bouncing foods to improve your health!

In addition, other legumes, vegetables, tubers and fruits such as okra, squash, green beans, celery, lettuce, sweet potatoes and nuts like almonds also contain the same amount of alkalinity as the foods mentioned above. .

Last on the list are sweeteners like honey, raw sugar and fruits like oranges, bananas, cherries, pineapples, peaches, avocados. These are also sweet, alkaline foods, but much less so than the foods mentioned above. Equal in alkalinity in the list are legumes, vegetables, tubers and fruits such as tomatoes, carrots, mushrooms, cabbage, corn, peas, potato skins, soybeans; nuts such as chestnuts and grains such as millet, wild rice; …

Acidic foods that you should not eat much

Besides alkaline foods, there are also acidic foods. Those foods are arranged in descending order of acidity as follows.

At the top of the ranking are sweeteners such as chemical sugar; fruits such as blueberries, prunes; beans, vegetables, tubers and fruits such as cocoa; nuts such as peanuts, walnuts; cereals such as wheat, white flour, cakes made from flour and sugar; …

Sugar is an acidic food, should not be used much

In second place in that ranking are sweeteners such as refined sugar; fruits such as sour cherries; legumes, vegetables, tubers and fruits such as potatoes without skins, legumes; nuts such as cashews; cereals such as white rice, rye; soft drinks, carbonated drinks;…

Holding last place in the rankings are sweeteners such as processed honey, molasses; fruits such as prunes, processed juices; legumes, vegetables, tubers and fruits such as kidney beans, string beans; oils such as corn oil; nuts such as pumpkin seeds, sunflower seeds; grains such as coarse grains (wheat, whole grains, brown rice);…

Effects of alkaline earth metals on the body

In addition to the effects as additives to make alloys with high elasticity, not corroding (Be); used as a reducing agent to separate oxygen and sulfur from steel; used to synthesize many organic compounds, etc., the earth-controlling metal for the body also has a huge role that few people know.

You may not know, science has proven that cancer cells and tumors live and thrive best in an acidic environment. Therefore, in order to prevent serious cancer, alkalizing the body is a measure that you should do every day, starting today.

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In particular, if alkalinity can be maintained, not only cancer, the likelihood of disease will be reduced to only 10%. Not only that, if our body is always in alkaline balance, the hormones beneficial to the body will be multiplied many times. From there, people’s mental state will be more stable, people will always be in a positive state and love life.

Those are the main uses that alkaline earth metals can bring to our body.


So, through this article, readers must have understood more about the nature, properties, uses, and elements of the word. alkaline earth metal and the compounds that come from them. Hopefully, this article will partly help you form the habit of eating foods that are rich in alkaline substances and through that, your health will probably improve better every day.

See also: What is alkaline water? – The ideal source of water for a healthy lifestyle

See also: What is electrolyte water? 10 simple electrolyte replacement drinks that are easy to find

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