Which Is True Concerning the Difference Between Second-Row and Third-Row

question 24

Multiple Choice

Which is true concerning the difference between second-row and third-row main group nonmetals?

• A) Third-row nonmetals react readily with acids, while second-row nonmetals are mostly unreactive towards acids.
• B) Third-row hydrides tend to be more acidic than second-row hydrides.
• C) Third-row oxides tend to be less basic than second-row oxides.
• D) In their elemental forms, third-row nonmetals are comprised of molecules, while second-row nonmetals are comprised of individual atoms.
• E) Atoms of third-row nonmetals may have high oxidation numbers, while atoms of second-row nonmetals may only have negative oxidation numbers.

---

Definitions:

Epigenetics

The study of heritable changes in gene expression that do not involve changes to the underlying DNA sequence.

Nature and Nurture

The debate regarding the relative contributions of genetic inheritance (nature) and environmental factors (nurture) to human development.

Heredity

The passing on of physical or mental characteristics genetically from one generation to another.

Genes and Chromosomes

Elements of heredity with genes being the molecular units of inheritance on chromosomes, which are long strands of DNA containing a sequence of genes.