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Introduction to Chemical Reactions01:23

Introduction to Chemical Reactions

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All chemical reactions begin with a reactant, the general term for one or more substances entering the reaction. Sodium and chloride ions, for example, are the reactants in the production of table salt. One or more substances produced by a chemical reaction are called the product. Chemical reactions follow the law of conservation of mass, which means that matter cannot be created nor destroyed in a chemical reaction. The components of the reactants—the number of atoms and the...
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A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
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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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Chemical Reactions02:26

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A balanced chemical equation provides the information of chemical formulas of the reactants and products involved in the chemical change. A reaction’s stoichiometry helps predict how much of the reactant is needed to produce the desired amount of product, or in some cases, how much product will be formed from a specific amount of the reactant.
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Effects of Chemicals: Overview01:27

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Drugs, encompassing various chemical compounds from natural sources, lab synthesis, or genetic engineering, elicit different biological responses in living organisms. Some of these responses are desirable or therapeutic, while others are undesirable. The primary goal of administering a drug is to achieve a therapeutic effect, that is, to address a specific disease or health condition. Any concurrent effects outside of this therapeutic outcome are considered undesirable. These undesirable...
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Chemical Bonds
The electrons of the outermost energy level determine the energetic stability of the atom and its tendency to form chemical bonds with other atoms. The innermost electron shell has a maximum capacity of two electrons, but the next two electron shells can each have a maximum of eight electrons. This is known as the octet rule, which states that, with the exception of the innermost shell, atoms are most stable energetically when they have eight electrons in their valence shell, the...
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Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior
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A journey through chemical dynamics.

William H Miller1

  • 1Department of Chemistry and Kenneth S. Pitzer Center for Theoretical Chemistry, University of California, Berkeley, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720;

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Summary
This summary is machine-generated.

This autobiographical article details a personal journey into a scientific career, emphasizing how choices and research directions evolved organically rather than through a rigid plan.

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Area of Science:

  • This article falls under the broad area of scientific career development and personal scientific journeys.
  • It touches upon the evolution of scientific interests and research directions over time.

Background:

  • The author was invited to share their personal story leading to a career in science.
  • The narrative focuses on the path taken and the scientific directions pursued.

Discussion:

  • The author reflects on their career trajectory, highlighting its unplanned and emergent nature.
  • This personal account contrasts with a formal scientific review, focusing on lived experience.

Key Insights:

  • Scientific careers can develop organically, shaped by a series of events rather than a predetermined plan.
  • Personal narrative is valuable for understanding the human element in scientific progression.

Outlook:

  • The author's journey suggests that embracing emergent opportunities is key to scientific exploration.
  • This personal reflection may inspire others navigating their own scientific paths.