Concept explainers
(a)
Interpretation:
The non-hydrogen atom in each case should be identified and the molecular formula for each hydride should be written.
Concept introduction:
Hydrogen can form only one bond. So, atom with more than one bond is the non-hydrogen atom. The second row elements contain Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, fluorine and neon.
(b)
Interpretation:
An electron-dot structure for each hydride should be drawn. For which hydride there is a problem in drawing the structure should be determined.
Concept introduction:
Electron-dot structure represents valence electrons of an atom by dots and show how they are distributed in a molecule. Every atom tries to a complete valence shell or to achieve noble gas configuration by making bonds with other atoms.
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CHEMISTRY-TEXT
- Compounds such as NaBH₄, Al(BH₄)₃, and LiAlH₄ arecomplex hydrides used as reducing agents in many syntheses.(a) Give the oxidation state of each element in these compounds.(b) Write a Lewis structure for the polyatomic anion in NaBH₄,and predict its shape.arrow_forwardQ.5(a) The alkali metals follow the noble gases in their atomic structure. What properties of these metals can be predicted from this information? (b) Arrange the carbonates of alkaline earth metals in order of thermal stability. (c) Explain the process involved in the manufacture of NaOH, Na2CO3 and NaHCO3. (d) Identify the element X in each of the following: (i) The oxide of XO2 has a high M.P., and is very abundant in nature. (ii) X forms three oxides: XO, XO2, X3O2. (iii) X forms compounds mainly in the +2 O.S., though some compounds in +4 state do exist. (iv) X occurs as several allotropes, including a molecular one. (e) Borazine reacts with three mole equivalents of HCl to give a material with chemical composition B3N3H9C13. (i) What is the structure of product? (ii) How does the isoelectronic benzene react with HCl? (f) Explain why bond length in NO (115 pm) is longer than that in nitrosonium ion (106 pm)?arrow_forward(b) Is boron a metal or a non-metal? Give reasons for your answer. (c) Why is aluminium a useful structural material even though it reacts readilywith water and oxygen? (d) What is the usual valence shown by elements of Group 13 in compounds?arrow_forward
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- 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_forwardEach of the chemically active Period 2 elements forms stable compounds in which it has bonds to fluorine. (a) What are the names and formulas of these compounds? (b) Does ∆EN increase or decrease left to right across the period? (c) Does percent ionic character increase or decrease left to right? (d) Draw Lewis structures for these compoundsarrow_forwardWrite a Lewis structure for each of the following molecules and ions:(a) (CH3)3SiH(b) SiO44−(c) Si2H6(d) Si(OH)4(e) SiF62−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