Milli prefix

Prefixes used for powers of 10 are 10 mega M 10 milli m micro jj. 

Milli- The prefix on a metric unit indicating a multiple of 10-3,7-9... 

Prefix deci- centi- milli- micro- nano- pico- fcmto- atto- zepto-... 

Larger and smaller distances may be measured with units formed by the addition of prefixes to the word meter. The important metric prefixes are listed in Table 2-2. The most important prefixes are kilo, milli, and centi. The prefix kilo means 1000 times the basic unit, no matter to which basic unit it is attached. For example, a kilodollar is 1000. The prefix milli indicates one-thousandth of the basic unit. Thus, 1 millimeter is 0.001 meter 1 mm = 0.001 m. The prefix centi means one-hundredth. A centidollar is one cent the name for this unit of money comes from the same source as the metric prefix. 

Since milli is a prefix, it must always precede a quantity. If m is used without another letter, or if the m follows another letter, it stands for the unit meter. If m precedes another letter, it stands for the prefix milli. 

The value of R changes if we express the ideal-gas equation (Equation (1.13)) with different units. Table 2.3 gives values of R in various other units. We must note an important philosophical truth here the value of the gas constant is truly constant, but the actual numerical value we cite will depend on the units with which we express it. We met a similar argument before on p. 19, when we saw how a standard prefix (such as deca, milli or mega) will change the appearance of a number, so V = 1 dm3 = 103 cm3. In reality, the number remains unaltered. 

The most common way of representing volume in chemistry is by using liters (L). You can treat the liter like you would any other metric base unit by adding prefixes to it, such as milli- or deci-. 

The most common prefixes used in medicine are kilo, which is 1,000 times the base unit, centi, which is 1/100 of the base unit, and milli, which is 1/1,000 times the base unit. These prefixes are attached to the base unit to give the multiple of the base unit being measured. Therefore, a kilogram is 1,000 grams. A centimeter is 1/100 of a meter. A milliliter is 1/1,000 of a liter. 

SI base units include the meter (m), kilogram (kg), second (s), ampere (A), kelvin (K), and mole (mol). Derived quantities such as force (newton, N), pressure (pascal. Pa), and energy (joule, J) can be expressed in terms of base units. In calculations, units should be carried along with the numbers. Prefixes such as kilo- and milli- are used to denote multiples of units. Common expressions of concentration are molarity (moles of solute per liter of solution), molality (moles of solute per kilogram of solvent), formal concentration... 

One major advantage of the metric system is that it uses a decimal system, which means all units are related to smaller or larger units by a factor of 10. Some of the more commonly used prefixes along with their decimal equivalents are shown in Table 1.2. From this table, you can see that 1 kilometer is equal to 1000 meters, where the prefix kilo- indicates 1000. Likewise, 1 millimeter is equal to 0.001 meter, where the prefix milli- indicates Xooo- You need not memorize this table, but you will find it a useful reference when you come across these prefixes in your course of study. 

WFor very large or very small quantities, commonly used prefixes represent amounts that vary by three powers of 10, for example, milli, micro, nano, and pico (10 3,10 6,10 9, and 10 l2, respectively). 

For gases and liquids the liter is a much more practical measure of volume, especially in concentration expressions, than the derived unit of cubic meter, m3. Usage therefore has established the liter (L) as an accepted named unit, even though cubic decimeter (dm3) is the correct SI designation. The only prefix to be used with liter is milli, that is milliliter (ml). The symbol L is used for liter to prevent confusion with the letter I and the number 1. 

The prefix milli- means one-thousandth. No matter which primary unit it is used with, it always means 0.001 times that unit. A millimeter (mm) is 0.001 m, a milliliter (mL) is 0.001 L, and so on. 

Larger and smaller distances may be measured with units formed by the addition of prefixes to the word meter. The important metric prefixes are listed in Table 2-2. The most commonly used prefixes are kilo, milli. 

In trace analysis, the units used for component content should be appropriate for the amount. The most proper system is to give the mass fraction (wb) of the trace component (B) in SI units with the appropriate prefix milli- (10 ), micro- (10 ), nano- (10 ), pico- femto- (10 ), or atto- (Table 1.1). The... 

The equality that links the two units is 1000 mL = 1 L. (The prefix milli- represents 1/1000 of a base unit.)... 

The defining event of a radioactive nuclide is the transformation of its nucleus into the nucleus of another species, that is, radioactive decay. The number of nuclear transformations occurring per unit of time is called activity . Sometimes radioactivity is used instead of activity . The traditional unit of activity has been the Curie (Ci), which is equal to 3.7 X 10 ° nuclear transformations per second. The conversion of radiation units to the international system (Sysfme International d Unit or SI) has now taken place in the United States. The more fundamental unit of activity, the Becquerel (Bq), equal to 1 nuclear transformation per second, has replaced the Curie. Both units of activity are modified by prefixes such as kilo-, milli-, and micro- to achieve standard multiples of the fundamental unit. A listing of the most commonly used prefixes is given in Table 1. 

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