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    1.6: The Units of Measurement - Chemistry LibreTexts

    How do chemists measure matter?
    Matter can be identified as an element, a compound, or a mixture. Chemists measure the properties of matter and express these measurements as quantities. A quantity is an amount of something and consists of a number and a unit. The number tells us how many (or how much), and the unit tells us what the scale of measurement is.
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    Chapter 1: Measurements in Chemistry - Chemistry

    Learn the basics of chemistry, including matter, properties, elements, compounds, mixtures, and units of measurement. This online textbook covers the topics of chemistry and matter, the scientific method, scientific notation, and significant figures.

    Western Oregon University

    What is Chemistry?

    Everything around us is made up of chemicals. From the color that makes a rose so red to the gasoline that fills our cars and the silicon chips that power our computers and cell phones…Chemistry is everywhere! Understanding how chemical molecules form and interact to create complex structures enables us to harness the power of chemistry and use it, just like a toolbox, to create many of the modern advances that we see today. This includes advances in medicine, communication, transportation, b...

    Physical vs. Chemical Properties

    Part of understanding matter is being able to describe it. One way chemists describe matter is to assign different kinds of properties to different categories. The properties that chemists use to describe matter fall into two general categories. Physical properties are characteristics that describes matter, such as boiling point, melting point and color. Physical Changes, such as melting a solid into a liquid, do not alter the chemical structure of that matter. Chemical properties are charact...

    Elements and Compounds

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    The Scientific Method

    How do scientists work? Generally, they follow a process called the scientific method. The scientific method is an organized procedure for learning answers to questions. To find the answer to a question (for example, “Why do birds fly toward Earth’s equator during the cold months?”), a scientist goes through the following steps, which are also illustrated in Figure 1.7. Figure 1.7 The General Steps of the Scientific Method.The steps may not be as clear-cut in real life as described here, but...

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    The study of chemistry can involve numbers that are very large. It can also involve numbers that are very small. Writing out such numbers and using them in their long form is problematic, because we would spend far too much time writing zeroes, and we would probably make a lot of mistakes! There is a solution to this problem. It is called scientifi...

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    As you can see, the power to which 10 is raised is equal to the number of zeroes that follow the 1. This will be helpful for determining which exponent to use when we express numbers using scientific notation. Let us take a very large number:

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