Nobel Laureates in Chemistry: Chromatography, Radioactivity, and Ionic Dissociation

Nobel Laureates in Chemistry: Key Discoveries

Archer John Martin and Richard Laurence Millington Synge

Millington Synge: Awarded the 1952 Nobel Prize for Chemistry for their contribution to the knowledge of techniques of substance analysis, specifically in chromatography.

Chromatography is an analytical technique used to identify and separate the components of a mixture. It is based on the selective interaction of pigments with an adsorbent material. Different adsorbents are used to separate compounds

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Galvanic and Fuel Cells: Principles, Working & Construction

Galvanic Cell: Harnessing Redox Reactions

Among electrochemical cells, a galvanic cell supplies electric current by transferring electrons through a redox reaction. It demonstrates how energy can be harnessed from reactions between elements. Studying the setup and utilization of a galvanic cell to obtain energy is fascinating.

Working Principle

The working of a galvanic cell is straightforward. A chemical reaction makes electric energy available. During a redox reaction, a galvanic cell uses energy

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Tipos de Enlaces Químicos y Geometría Molecular

Enlace Iónico

Se presenta cuando los átomos participantes tienen una diferencia de electronegatividad apreciable, igual o mayor a 1.7. Es una fuerza electrostática que se establece debido a que se forman iones.

Los compuestos iónicos se caracterizan por:

  • Ser sólidos a temperatura ambiente.
  • Presentar altos puntos de ebullición y fusión.
  • Facilidad para romperse en estado sólido (fragilidad).
  • Ser malos conductores del calor y la electricidad en estado sólido (pero buenos conductores fundidos o en
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Chemical Ions, Compounds, Formulas, and Nomenclature

Ions, Compounds, and Chemical Formulas

Understanding Ions

An ion is a charged particle formed when a neutral atom or group of atoms gains or loses electrons.

Cations: Positively Charged Ions

A cation is a positively charged ion formed when a neutral atom loses electrons (e.g., Na⁺).

Na atom11 protons11 electrons
Na⁺ ion11 protons10 electrons

Anions: Negatively Charged Ions

An anion is a negatively charged ion formed when a neutral atom gains electrons (e.g., Cl⁻).

Cl atom17 protons17 electrons
Cl⁻
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Understanding Matter: States, Mixtures, and Synthetic Materials

Matter is formed by particles. A model represents how matter behaves and is based on two key ideas:

  • Matter is formed by tiny particles.
  • These particles that make up matter are in constant movement.

States of Matter

Solid

Particles are tightly bound and do not produce any movement; they only vibrate.

Liquid

Particles are less united and less ordered, allowing them to move.

Gas

Particles are together but can move freely.

Changes of State

If the temperature changes, a substance can transition from one state to

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Chemical Elements, Periodic Table, and Bonding Principles

Natural and Artificial Elements

There are approximately 90 naturally occurring elements. Necessary equipment in physics laboratories has allowed for the creation of additional, artificial elements. Few elements are found in their free state in nature; they are mainly found combined with other elements, forming compounds.

Element Distribution

Elements in the Earth’s Crust and Core

The element iron is abundant but primarily found in the Earth’s core. The Earth’s crust is mainly composed of oxygen and

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