The following models represent the structures of binary hydrides
of second-row elements:
(a) Identify the nonhydrogen atom in each case, and write the molecular formula for each hydride.

Verified step by step guidance

1. Examine each model and identify the nonhydrogen atom present in the structure.
2. For each model, note the chemical symbol of the nonhydrogen atom.
3. Combine the chemical symbol of the nonhydrogen atom with hydrogen (H) to form the molecular formula.
4. Ensure the correct stoichiometry by determining the number of hydrogen atoms bonded to the nonhydrogen atom.
5. Write the molecular formula for each hydride, ensuring the correct representation of the nonhydrogen and hydrogen atoms.

Key Concepts

Binary Hydrides

Binary hydrides are compounds formed from hydrogen and one other element, typically a nonmetal or metalloid. In the context of second-row elements, these hydrides include compounds like water (H2O) and ammonia (NH3). Understanding the nature of binary hydrides is essential for identifying the nonhydrogen atom and writing the correct molecular formula.

Molecular Formula

A molecular formula represents the number and type of atoms in a molecule. It is expressed using chemical symbols and subscripts, indicating the quantity of each element present. For example, the molecular formula for methane is CH4, indicating one carbon atom and four hydrogen atoms. Accurately determining the molecular formula is crucial for understanding the composition of the hydrides.

Second-Row Elements

Second-row elements refer to the elements in the second period of the periodic table, which includes lithium (Li) to neon (Ne). These elements exhibit varying properties and can form different types of compounds, including binary hydrides. Recognizing these elements and their common hydride forms is vital for identifying the nonhydrogen atom in the given models.