Measurements definitions

Important definitions when studying measurements in chemistry

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  1. A notation which is a straightforward expression of a number

    2. Missing Word
    Correct Answer:
    standard notation

    Explanation

    Standard notation is the straightforward expression of a number. Numbers such as 17, 101.5, and 0.00446 are expressed in standard notation.  This approach is fine for small numbers, but will be cumbersome for numbers with many zeros.

    Reference

    Beginning Chemistry v. 1.0

  2. It is a notation to express a number using powers of 10

    3. Missing Word
    Correct Answer:
    scientific notation

    Explanation

    Scientific notation is an expression of a number using powers of 10. Powers of 10 are used to express numbers that have many zeros

    Reference

    Beginning Chemistry v. 1.0

  3. Another name given to scientific notation

    4. Missing Word
    Correct Answer:
    exponential notation

    Explanation

    The raised number to the right of the 10 indicating the number of factors of 10 in the original number is the exponent. (Scientific notation is sometimes called exponential notation.) The exponent’s value is equal to the number of zeros in the number expressed in standard notation

    Reference

    Beginning Chemistry v. 1.0

  4. The part of a number in scientific notation that is multiplied by a power of 10

    5. Missing Word
    Correct Answer:
    coefficient

    Explanation

    The coefficient in this scientific number 7.9345 × 104  is 7.9345

     

    Reference

    Beginning Chemistry v. 1.0



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