For the Questions That Follow, Consider the BEST Lewis Structures

question 37

Multiple Choice

For the questions that follow, consider the BEST Lewis structures of the following oxyanions:
(i) NO₂^-
(ii) NO₃^-
(iii) SO₃^2-
(iv) SO₄^2-
(v) BrO₃^-
-In which of the ions do all X-O bonds (X indicates the central atom) have the same length?

• A)none
• B)all
• C)(i)and (ii)
• D)(iii)and (v)
• E)(iii), (iv), and (v)

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Definitions:

Content Validity

The extent to which a test measures all aspects of the concept it intends to assess.

Criterion Validity

An attribute of a test, when it gives higher scores to people already known to have greater ability in the area it tests. The concept arises because some qualities are easier to recognize than to define completely, such as artistic ability.

Construct Validity

A measure of how well a test or experiment measures up to its claims or theoretical assumptions.

Analogue Observational Setting

An artificial environment set up in an office or laboratory to elicit specific classes of behaviour in individuals. Used when in vivo observation in the natural environment is impractical because of time constraints and the unpredictability of modern family life.