Exhibit 1-2
Consider the structure of urea,shown below,to answer the following question(s). 
-Refer to Exhibit 1-2.Fill in any non-bonding valence electrons that are missing from the line-bond structure.
Definitions:
NCEs
Normal Curve Equivalents, a type of standardized score used in educational assessments to compare student performance across different age groups and grades.
Bell-shaped Curve
A graphical depiction of a normal distribution of data, where the bulk of data points lie near the mean, creating a symmetrical bell shape.
Percentiles
Statistical values that represent the position of a score in relation to other scores in a distribution, indicating the percentage of scores that lie below it.
Z-scores
Standardized scores that indicate how many standard deviations an element is from the mean of a dataset, used in comparing scores from different distributions.
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