(a)
Interpretation:
The group 3A element needs to be identified having an unsual low melting point.
Concept introduction:
The group 3 element is boron family. They have 3 valence electrons in the outermost shell. This group contains semi-metals or non-metals.
(b)
Interpretation:
The group 3A element needs to be identified which is most electronegative.
Concept introduction:
The group 3 element is boron family. They have 3 valence electrons in the outermost shell. This group contains semi-metals or non-metals.
(c)
Interpretation:
The group 3A element needs to be identified which extremely toxic.
Concept introduction:
The group 3 element is boron family. They have 3 valence electrons in the outermost shell. This group contains semi-metals or non-metals.
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Chapter 22 Solutions
LCPO CHEMISTRY W/MODIFIED MASTERING
- Name an alloy of:(i) Aluminium used is construction of aircrafts(ii) lead in joining metals for electric work(iii) copper used is house hold vesselsarrow_forwardGive the name and symbol or formula of a Group 5A(15)element or compound that fits each description or use:(a) Hydride produced at multimillion-ton level(b) Element(s) essential in plant nutrition(c) Hydride used to manufacture rocket propellants and drugs(d) Odd-electron molecule (two examples)(e) Amphoteric hydroxide with a 5A element in its 3 state(f) Phosphorus-containing water softener(g) Element that is an electrical conductorarrow_forwardWrite a balanced equation for each of the following reactions:(a) Diborane reacts with water to form boric acid andmolecular hydrogen. (b) Upon heating, boric acid undergoesa condensation reaction to form tetraboric acid. (c) Boronoxide dissolves in water to give a solution of boric acid.arrow_forward
- Write a balanced chemical equation for the reaction of an excess of oxygen with each of the following. Remember that oxygen is a strong oxidizing agent and tends to oxidize an element to its maximum oxidation state.(a) Mg(b) Rb(c) Ga(d) C2H2(e) COarrow_forwardWrite balanced chemical equations for the following reactions:(a) metallic aluminum burned in air(b) elemental aluminum heated in an atmosphere of chlorine(c) aluminum heated in hydrogen bromide gas(d) aluminum hydroxide added to a solution of nitric acidarrow_forwardWrite balanced chemical equations for the following reactions: (a) cadmium burned in air (b) elemental cadmium added to a solution of hydrochloric acidarrow_forward
- Give the name and symbol or formula of a Group 7A(17)element or compound that fits each description or use:(a) Used in etching glass(b) Naturally occurring source (ore) of fluorine(c) Oxide used in bleaching paper pulp and textiles(d) Weakest hydrohalic acid(e) Compound used to prevent goiter (thyroid disorder)(f) Element that is produced in the largest quantity(g) Organic chloride used to make plasticsarrow_forwardGive the name and symbol or formula of a Group 4A(14) el-ement or compound that fits each description or use:(a) Hardest known natural substance(b) Medicinal antacid(c) Atmospheric gas implicated in the greenhouse effect(d) Water proofing polymer based on silicon(e) Synthetic abrasive composed entirely of elements in thegroup(f) Product formed when coke burns in a limited supply of air(g) Toxic metal found in plumbing and paintsarrow_forwardIn general terms, how does each of the following atomic properties influence the metallic character of the main-group elements in a period?(a) Ionization energy(b) Atomic radius(c) Number of outer electrons(d) Effective nuclear chargearrow_forward
- Write a balanced equation for each of the following reactions:(a) Sulfur dioxide reacts with water. (b) Solid zincsulfide reacts with hydrochloric acid. (c) Elemental sulfurreacts with sulfite ion to form thiosulfate. (d) Sulfur trioxideis dissolved in sulfuric acid.arrow_forwardWrite balanced chemical equations for the following reactions:(a) zinc metal heated in a stream of oxygen gas(b) zinc carbonate heated until loss of mass stops(c) zinc carbonate added to a solution of acetic acid, CH3CO2H(d) zinc added to a solution of hydrobromic acidarrow_forward(A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. When a non-metallic oxide reacts with water, a base will be formed as the product of the reaction. When a metallic oxide like phosphorous pentoxide reacts with water, a base will be formed as the product of the reaction. 2. When water is mixed with oxides, hydrogen gas is evolved. A red to blue color change in the litmus paper indicates that the solution tested is an acid. 3. The filtrate in any filtration process is left on the surface of the filter paper, while the residue is collected at the bottom of the flask/container after passing through the filter paper. In the distillation process, the methyl violet served as a compound to acidify the water. 4. In the Winkler Titration Method, the starch solution turns colorless in the presence of free iodine in the solution to be titrated. In the Winkler…arrow_forward
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