# Measurements definitions (Answers)

Important definitions when studying measurements in chemistry

### A notation which is a straightforward expression of a number

### It is a notation to express a number using powers of 10

### Another name given to scientific notation

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

#### 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

#### 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

#### 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

#### Explanation

The coefficient in this scientific number 7.9345 × 10^{4 }is 7.9345

#### Reference

Beginning Chemistry v. 1.0

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