Can form an ionic bond with HCl

Elements and molecules, school book

SeLBStteSt If you have worked through the material in the chapter well, you can safely answer the following questions quickly: 1 Which of the following compounds can form hydrogen bonds? ■ NH 3 ■ HF ■ CH 4 ■ HI 2 In which connection is the secondary valence force strongest? ■ H 2 O ■ H 2 S ■ F 2 ■ CO 2 3 Methane ■ a: has the empirical formula NH 3. ■ b: is a dipole molecule. ■ c: is soluble in water. ■ d: is gaseous. 4 What is the spatial structure of the following molecules? CO 2 NH 3 CH 4 H 2 O ■ angled - pyramidal - stretched - tetrahedral ■ stretched - pyramidal - tetrahedral - angled ■ stretched - tetrahedral - pyramidal - angled ■ pyramidal - tetrahedral - tetrahedral - stretched 5 ionic compounds ■ a: are brittle. ■ b: are usually readily soluble in water. ■ c: is also called salts. ■ d: are solids. 6 Which of the following atoms can form an ionic charge of +1? ■ Na ■ Al ■ Cl ■ Tl 7 Which of the rankings according to increasing boiling points are correct? ■ a: CH 4; SiH 4; GeH 4; SnH 4 ■ SiH 4; GeH 4; SnH 4; CH 4 ■ c: HF; HCl; HBr; HI ■ HCl; HBr; HI; HF 8 Which molecules do not have mesomerism? ■ HCl ■ SO 2 ■ H 2 O ■ CO 2 9 Which element (E) forms the compound Mg 3 E 2 with Mg? ■ O ■ N ■ Al ■ F 10 Which of the following molecules have an odd total number of electrons? ■ NO ■ NO 2 ■ N 2 O ■ P 4 O 10 11 Which statements about the sulfur atom are correct? ■ Sulfur is in the 16th group. ■ Sulfur forms doubly negatively charged ions in an ionic bond. ■ When atoms are bonded, sulfur always forms two bonds. ■ the charged sulfur atom is called nitride. 12 Which substances can conduct electricity? ■ C graphite ■ NaCl ■ Na + (aq) + Cl - (aq) ■ Cu 13 Which of the following compounds are polar? ■ SO 2 ■ SO 3 ■ CO 2 ■ NH 3 14 Which of the following formulas are wrong? ■ Cu 2 ■ SO 4 ■ NCl 5 ■ H 4 S 15 Which of the following compounds are hydrophilic? ■ NH 3 ■ N 2 ■ NaCl ■ CCl 4 265 solutions: 1: a, b - 2: a - 3: d - 4: b - 5: a, b, c, d - 6: a, d - 7: a, d - 8: a, c, d - 9: b - 10: a, b - 11: a, b - 12: a, c, d - 13: a, d - 14: a, b, c, d - 15: a, c. THEME AREAS - networked content and terms The content and key words of the following topics can be used as a basis for answering exam questions and presentations on chemistry. 1 Comparison of the binding models Description of the binding force, formation of molecules or lattices, possible formulas, examples, properties resulting from the models. 2 The atomic bond model Basic principle of the model, sum and structural formula, hybridization, coordinative bond, mesomerism, spatial structure, polar and non-polar connections, secondary valence forces, properties, atomic lattice. 3 Polar and non-polar compounds Basic principle of the atomic bond model, VSEPR model, electronegativity, examples (can be linked to examples from organic chemistry). 4 Water bonding, dipole molecule, hydrogen bond, anomaly of water, water as a solvent. (In Chapter 4, H 2 O is also described as an acid or base and as a reducing and oxidizing agent. Chapter 6.3 only deals with water.) 5 The Ionic Bonds Binding model, energy diagram for the formation of an ionic compound, examples ( also with polyatomic ions), properties - water solubility (hydrate shell, crystal water), conductivity. (See also Chapter 4.3 - Electrolysis and Chapter 5 - Salts) 6 The metal bond Bond model, possible lattice structures, properties. (Special metals are discussed in chapter 5.7. 2 THE CHEMICAL BOND SELF-TEST - Subject areas a: c: b: d: For testing purposes only - property of the publisher öbv

Made with FlippingBook

RkJQdWJsaXNoZXIy ODE3MDE =