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Related Concept Videos

Coordination Number and Geometry02:57

Coordination Number and Geometry

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For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
19.0K
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
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Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
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Accelerators01:17

Accelerators

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Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
The effectiveness of calcium chloride can...
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Equations of Motion: Rectangular Coordinates and Cylindrical Coordinates01:21

Equations of Motion: Rectangular Coordinates and Cylindrical Coordinates

775
Understanding the motion of particles is a fundamental aspect of classical mechanics, and the choice of the coordinate system plays a pivotal role in unraveling the complexities of their dynamics.
When a particle moves relative to an inertial frame, the equations of motion can be expressed using rectangular components. If the motion is confined to the x-y plane, the equations having the x and y coordinates only can be used to simplify the mathematical representation.
However, when particles...
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Spherical Coordinates01:23

Spherical Coordinates

16.0K
Spherical coordinate systems are preferred over Cartesian, polar, or cylindrical coordinates for systems with spherical symmetry. For example, to describe the surface of a sphere, Cartesian coordinates require all three coordinates. On the other hand, the spherical coordinate system requires only one parameter: the sphere's radius. As a result, the complicated mathematical calculations become simple. Spherical coordinates are used in science and engineering applications like electric and...
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Updated: Feb 2, 2026

High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents HPHC
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Coordinated, systemwide efforts necessary to accelerate progress against preventable harm.

Tejal Gandhi

    Modern Healthcare
    |November 9, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Preventable harm in healthcare causes numerous deaths and requires a public health crisis approach. A coordinated response is essential to address this critical issue and improve patient safety outcomes.

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    Area of Science:

    • Public Health
    • Healthcare Quality and Safety

    Background:

    • Preventable harm in healthcare is a significant and under-addressed issue in the United States.
    • It represents a major cause of mortality, necessitating urgent attention.

    Purpose of the Study:

    • To highlight the critical need for a coordinated public health response to preventable harm in healthcare.
    • To advocate for a systemic approach to mitigate patient harm.

    Main Methods:

    • This study synthesizes existing data and literature on healthcare-related harm.
    • It analyzes the impact of preventable harm on mortality rates.
    • It proposes a framework for a coordinated response.

    Main Results:

    • Preventable harm is identified as a leading cause of death in America.
    • Current responses are fragmented and insufficient to address the scale of the problem.

    Conclusions:

    • Healthcare-related preventable harm should be recognized and managed as a public health crisis.
    • A dedicated, coordinated response strategy is imperative to reduce patient mortality and improve healthcare safety.