Directions: Apply the Knowledge You Have Gained from Chapter 2

question 20

Multiple Choice

Directions: Apply the knowledge you have gained from Chapter 2 to select the best answer to the questions about the following reading passage. ​
"Famine and AIDS are threatening the agricultural societies in southern Africa. Tragically, women, the main unifying force in African societies, make up 59% of the individuals worldwide infected by the HIV virus. With so many women suffering from AIDS, the family structure and the agricultural infrastructure are suffering severely. These conditions have significantly contributed to the famine conditions and the resulting starvations."
​What is the topic of the reading passage?

• A)AIDS in populations worldwide
• B)famine in southern Africa
• C)the relationship between female AIDS victims in Africa and famine
• D)none of the above

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Definitions:

Isoelectronic

Describes atoms, molecules, or ions that have the same number of electrons and similar electronic structure, but different nuclear charges.

Octet Rule

A chemical rule of thumb that states atoms tend to combine in such a way that they each have eight electrons in their valence shells, giving them the same electron configuration as a noble gas.

Lewis Dot Structure

A diagrammatic method for representing an atom's valence electrons and the chemical bonds between atoms within a molecule.

Helium (He)

A colorless, odorless, tasteless, non-toxic, inert monatomic gas with the atomic number 2, making it the second lightest and second most abundant element in the observable universe.