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Related Concept Videos

Bonding in Metals02:32

Bonding in Metals

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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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Alkali Metals03:06

Alkali Metals

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Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Properties of Transition Metals02:58

Properties of Transition Metals

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Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
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Theory of Metallic Conduction01:17

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The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
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Related Experiment Video

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[Magnesium and heavy metals].

J Karczewski

    Vestnik Akademii Meditsinskikh Nauk SSSR
    |January 1, 1991
    PubMed
    Summary

    Magnesium interactions with heavy metals in the body show both synergistic and antagonistic effects. Understanding these relationships is key to assessing magnesium

    Area of Science:

    • Biochemistry
    • Toxicology
    • Human Physiology

    Background:

    • Magnesium is an essential mineral with a critical biological role.
    • Heavy metals can interfere with biological processes.
    • Interactions between magnesium and heavy metals are not fully understood.

    Purpose of the Study:

    • To review and synthesize existing literature on the correlation between magnesium and heavy metals in the human body.
    • To elucidate the nature of these interactions, categorizing them as synergistic or antagonistic.

    Main Methods:

    • Comprehensive literature review of scientific publications.
    • Analysis of data on magnesium and heavy metal interactions.
    • Classification of metals based on their toxicological and biological relevance.

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    Main Results:

    • Identified synergistic and antagonistic effects between magnesium and various heavy metals.
    • Categorized heavy metals into toxic elements (e.g., lead) and bioelements (e.g., zinc).
    • Highlighted the influence of these interactions on magnesium's biological functions.

    Conclusions:

    • The biological role of magnesium is significantly influenced by its interactions with other metals.
    • Distinguishing between toxic metals and essential bioelements is crucial for understanding these complex interactions.
    • Further research is warranted to fully elucidate the mechanisms of magnesium-metal interplay.