Use the Information Extracted from the Periodic Table in Figure

question 73

Multiple Choice

Use the information extracted from the periodic table in Figure 2.2 to answer the following questions.


-Fluorine has an atomic number of 9 and a mass number of 19. How many electrons are needed to complete the valence shell of a fluorine atom?

• A)1
• B)3
• C)5
• D)7

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Definitions:

Normal Probability Distribution

A continuous probability distribution characterized by a symmetrical bell-shaped curve, where the mean, median, and mode are all equal.

Standard Normal Distribution

A probability distribution that has a mean of zero and a standard deviation of one, also represented by the standard normal curve.

Z-score

A measure that describes a value's relationship to the mean of a group of values, represented in units of standard deviation.

Third Quartile

The value that divides the top 25% of a data set from the bottom 75%, often used as a measure of data spread.