Concept explainers
(a)
Interpretation:
Each binary hydride should be identified as ionic, covalent or interstitial.
Concept introduction:
The location of each element in the periodic table determines the formula of the hydride it forms. Alkali metals form ionic hydrides and have the formula
(b)
Interpretation:
The oxidation state of hydrogen and the other element in compounds (1), (2) and (3) should be determined.
Concept introduction:
In ionic hydrides, hydrogen is in oxidation state and in other types of hydride, hydrogen is in
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LCPO CHEMISTRY W/MODIFIED MASTERING
- Which of the following statements are true?(a) Si can form an ion with six fluorine atoms, SiF62-,whereas carbon cannot.(b) Si can form three stable compounds containing two Siatoms each, Si2H2, Si2H4, and Si2H6.(c) In HNO3 and H3PO4 the central atoms, N and P, havedifferent oxidation states.(d) S is more electronegative than Se.arrow_forwardPlease Write the chemical equations for the following processes in the image below.arrow_forwardConsider the following three statements about the reactivityof an alkali metal M with oxygen gas:(i) Based on their positions in the periodic table, the expectedproduct is the ionic oxide M2O.(ii) Some of the alkali metals produce metal peroxides or metalsuperoxides when they react with oxygen.(iii) When dissolved in water, an alkali metal oxide produces abasic solution.Which of the statements (i), (ii), and (iii) is or are true?(a) Only one of the statements is true.(b) Statements (i) and (ii) are true.(c) Statements (i) and (iii) are true.(d) Statements (ii) and (iii) are true.(e) All three statements are true.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_forwardAluminum reacts with iodine in the presence of hot water, to exothermically produce aluminum iodide. Give the Balanced chemical equation involved.arrow_forwardThe elements sodium, aluminum, and chlorine are in the same period. (a) Which has the greatest electronegativity? (b) Which of the atoms is smallest? (c) Which is the largest possible oxidation state for each of these elements? (d) Will the oxide of each element in the highest oxidation state (write its formula) be acidic, basic, or amphoteric?arrow_forward
- A sample of 70.5 mg of potassium phosphate is added to 15.0 mL of 0.050 M silver nitrate, resulting in the formation of aprecipitate. (a) Write the molecular equation for the reaction. (b) What is the limiting reactant in the reaction? (c) Calculatethe theoretical yield, in grams, of the precipitate that forms.arrow_forwardAll alkali metals and akaline earth metals are strong reducing agents and couldbe oxidized by water. Write a general reaction equation for the oxidation of both.arrow_forward(a) (i) (ii) (iii) With the aid of a simple schematic, explain what covalent bonding is and how it is formed. What are the differences between a covalent bond and an ionic bond? Which type of bond is found in crystalline silicon? At room temperature do you expect an ionic crystal to be a good electrical conductor or a good electrical insulator? Explain why.arrow_forward
- a) Give the atomic number of sulphur and the electronic configuration of its isolated atom b) For sulphur dioxide (SO2) hydrogen sulphide (H2S) molecules and sulphate ion (So,) respectively (i) State the oxidation number of the sulphur. (ii) Show their structural formula including the outer electrons. (iii) Describe in words or by a diagram the shape of the molecule or ions.arrow_forwardWhat is a disproportionation reaction, and which of thefollowing fit the description?(a) I₂(s) +KI(aq) →KI₃(aq)(b) 2ClO₂(g) +H₂O(l) →HClO₃(aq) +HClO₂(aq)(c) Cl₂(g)+ 2NaOH(aq)→ NaCl(aq)+ NaClO(aq)+ H₂O(l)(d) NH₄NO₂(s)→ N₂(g) +2H₂O(g)(e) 3MnO₄²⁻(aq)+ 2H₂O(l) →2MnO₄(aq) +MnO₂(s) +4OH(aq)(f) 3AuCl(s) →AuCl₃(s)+ 2Au(sarrow_forwardWhich of the following statements are true?(a) Both nitrogen and phosphorus can form a pentafluoridecompound.(b) Although CO is a well-known compound, SiO does notexist under ordinary conditions.(c) Cl2 is easier to oxidize than I2.(d) At room temperature, the stable form of oxygen is O2,whereas that of sulfur is S8.arrow_forward
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningChemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStax