3. A chemistry teacher is currently focusing on the objective, 'Given chemical compound names, students will write the correct chemical formulas four out of five ×.'
Answer: C
Students will express compounds using names and formulas.
The objective focuses on students writing the correct chemical formulas based on given compound names, which aligns directly with expressing compounds using names and formulas.
A) Identify element names from given symbols.
This option is incorrect because it emphasizes recognizing element names from symbols rather than translating compound names into chemical formulas. The objective specifically requires students to write formulas based on compound names, not identify elements.
B) Classify compounds as ionic or molecular.
While classifying compounds is an important skill in chemistry, this option does not directly relate to the objective of converting compound names into their corresponding formulas. The focus of the objective is on writing formulas, not classification.
C) Express compounds using names and formulas.
This is the correct answer as it directly matches the objective of the teacher. It requires students to transform the given names of chemical compounds into their corresponding chemical formulas, which is the core of the learning goal.
D) Describe characteristics of named compounds.
This option is incorrect because it involves discussing the properties or characteristics of compounds rather than writing their chemical formulas. The objective is specifically about formula writing, not descriptive analysis.
Conclusion
Choice C is definitively correct as it encapsulates the main goal of the objective: enabling students to write chemical formulas from names. The other options, while relevant to chemistry, do not address the specific task of converting names into formulas, thereby failing to meet the intended learning outcome.