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Related Concept Videos

Chemical Formulas02:52

Chemical Formulas

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A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural.
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Chemical equations represent the identities and relative quantities of substances involved in a chemical reaction. The substances undergoing reaction are called reactants, and their formulas are placed on the left side of the equation. The substances generated by the reaction are called products, and their formulas are placed on the right side of the equation. Plus signs (+) separate individual reactant and product formulas, and an arrow (→) separates the reactant and product (left and right)...
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A chemical reaction is a process by which the bonds in the atoms of substances are rearranged to generate new substances. Matter cannot be created or destroyed in a chemical reaction—the same type and number of atoms that make up the reactants are still present in the products. Merely, the rearrangement of chemical bonds produces new compounds.
Chemical Reactions Rearrange Atoms into New Substances
A chemical reaction takes starting materials—the reactants—and changes them...
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The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most concise way of representing this elemental makeup. When a compound’s formula is unknown, measuring the mass of its constituent elements is often the first step in determining the formula experimentally.
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Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O. 
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The characteristics that enable us to distinguish one substance from another are called properties.
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Micro/Nano Devices for Chemical Analysis.

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Micro total analysis systems (µ-TAS) have spurred the development of diverse micro/nano devices across multiple scientific disciplines. This research explores the broad impact and applications of these miniaturized analytical systems.

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Area of Science:

  • Multidisciplinary research encompassing chemistry, engineering, biology, and medicine.

Background:

  • The concept of micro total analysis systems (µ-TAS) has driven innovation in miniaturized analytical devices.
  • Researchers across various scientific fields have contributed to the development of micro/nano devices.

Discussion:

  • The abstract highlights the broad impact and interdisciplinary nature of micro/nano device research.
  • It sets the stage for discussing specific applications and advancements within µ-TAS.

Key Insights:

  • Micro/nano devices are central to the advancement of µ-TAS.
  • Interdisciplinary collaboration is crucial for progress in this area.

Outlook:

  • Continued development of micro/nano devices promises expanded analytical capabilities.
  • Future research will likely focus on integrating these devices for complex analyses.