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chemicals    音标拼音: [k'ɛmɪkəlz]
n. 化学药品

化学药品


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英文字典中文字典相关资料:


  • PubChem
    PubChem is the world's largest collection of freely accessible chemical information Search chemicals by name, molecular formula, structure, and other identifiers Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more
  • What Is a Chemical? Definition and Examples - Science Notes and Projects
    Chemicals come in various forms depending on their composition, structure, and how they interact with other substances Understanding the main types of chemicals helps classify the substances we encounter in the lab, in industry, and in everyday life
  • Chemistry | Definition, Topics, Types, History, Facts | Britannica
    Most of the materials that occur on Earth, such as wood, coal, minerals, or air, are mixtures of many different and distinct chemical substances Each pure chemical substance (e g , oxygen, iron, or water) has a characteristic set of properties that gives it its chemical identity
  • Substance (chemistry) - Wikipedia
    Chemical substances can exist in several different physical states or phases (e g solids, liquids, gases, or plasma) without changing their chemical composition Substances transition between these phases of matter in response to changes in temperature or pressure
  • What is a Chemical ? | Nuclear Regulatory Commission - NRC
    Chemical changes are different from physical changes, which don't result in a change in substances One example of a physical change is when water freezes into ice While ice may have different physical properties, it is still just water Another example is when you dissolve salt into a cup of water
  • Chemicals, Pesticides and Toxics Topics | US EPA
    Learn how to safely handle chemicals, the effects of certain toxins, which substances are controlled or managed, and safer alternatives
  • What Is and Is Not a Chemical? - ThoughtCo
    Key Takeaways A chemical is any substance that is made of matter, like solids, liquids, or gases Light, heat, and sound are not chemicals since they are not made of matter Chemicals can be both natural, like oxygen, or artificial, like stainless steel
  • 12 Types of Chemicals Explained | Uses, Examples Safety Tips
    Learn about 12 types of chemicals with examples, uses, and safety tips Explore acids, bases, polymers, pharmaceuticals, and more in everyday life
  • Chemical Facts and Information
    A chemical is any substance with a defined composition Chemicals can be naturally occurring or manufactured Some chemicals can produce odors while others may not Some chemicals are toxic and can cause health effects under certain conditions Reducing your exposure to chemicals can lower the risk of health effects
  • CHEMICAL Definition Meaning - Merriam-Webster
    The meaning of CHEMICAL is of, relating to, used in, or produced by chemistry or the phenomena of chemistry How to use chemical in a sentence





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