A cоmmunity mentаl heаlth prоgrаm serving Indigenоus families finds that many clients are uncomfortable working with professionals who do not understand their culture. To provide more culturally appropriate services, the program trains local community members who have experience working with families and young people. Which group best represents the community members the program would recruit?
Using the Periоdic Tаble: Predicting Hоw the Pоwder's Elements Behаve (Bаsed on Chapter 2, Sections 2.5–2.6 — "The Periodic Table" and "Ionic and Molecular Compounds") The laboratory has narrowed the unknown white powder to two candidates: sodium chloride (NaCl) or glucose (C₆H₁₂O₆). The periodic table can help predict how the elements in each candidate behave and what type of compound they form. A. Classify each of the following elements as a metal or a nonmetal: carbon (C), hydrogen (H), oxygen (O), sodium (Na), and chlorine (Cl). Then give the group name for sodium and for chlorine (for example: "noble gas"). (Help: Section 2.5 — Figure 2.26 color code and Figure 2.27 group names) B. Predict the ion that sodium forms and the ion that chlorine forms. For each, give the symbol with its charge, and in one sentence explain how the element's group number lets you predict that charge. (Help: Section 2.6 — Figure 2.29 and the discussion of cations and anions) C. Using the positions of the elements on the periodic table, explain why chemists predict that NaCl is an ionic compound while glucose is a molecular (covalent) compound. Your answer should mention which kinds of elements (metals or nonmetals) combine in each case. (Help: Section 2.6 — "Ionic Compounds" and "Molecular Compounds"; Example 2.12)
Nаming Chemicаl Cоmpоunds: Writing the Finаl Lab Repоrt (Based on Chapter 2, Section 2.7 — "Chemical Nomenclature") Testing is complete: the unknown powder is calcium chloride. Before filing the report, the chemist must correctly name several compounds logged during the investigation. Standardized names ensure that scientists and healthcare professionals communicate clearly about substances. A. Write the correct chemical name for each compound: CaCl₂ (the identified powder) FeCl₃ (a reagent used in testing) N₂O₄ (a gas detected by the instrument) (Help: Section 2.7 — Tables 2.6, 2.9, and 2.11) B. FeCl₃ requires a Roman numeral in its name, but CaCl₂ does not. In 1–2 sentences, explain why. (Help: Section 2.7 — "Compounds Containing a Metal Ion with a Variable Charge") C. The lab must order more ammonium chloride for future tests. Write its chemical formula. (Help: Section 2.6, Table 2.5 for the ammonium ion; Section 2.7, Table 2.7) D. In one sentence, explain one reason standardized chemical names matter in a medical laboratory.