Concept explainers
(a)
Interpretation:
The atom that has greater electronegativity among
Concept Introduction:
Electronegativity is defined as ability of an atom to attract the shared electrons in a
Electronegativity is measured by the relative scale. All elements are compared with the most electronegative element that is as fluorine has an electronegativity value of 4.0. The trend of electronegativity in the group and period is as follows:
1. Group: Electronegativity decreases from top to bottom within a group due to the larger atomic size. The larger distance between the nucleus and the valence electron shell, the lesser the attraction atom has for electrons or protons.
2. Period: Electronegativity increases from left to right across a period. This is due to an increase in nuclear charge. Alkali metals have the lowest electronegativity.
(b)
Interpretation:
The atom that has greater electronegativity among
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
The atom that has greater electronegativity among
Concept Introduction:
Refer to part (a).
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Chemistry: Principles and Practice
- 1.- Answer the following questions: (a) What is electronegativity? (b) How is electronegativity measured numerically? Name the scale used and the range of values in the scale. (c) Explain how electronegativity differences between atoms result in nonpolar covalent bonds and polar covalent bonds. Make sure you explain the difference between nonpolar covalent and polar covalent bonds as it relates to the electronegativity of the participating atoms.arrow_forwardWrite an electron configuration for each element and the corresponding Lewis structure. Indicate which electrons in the electron configuration are included in the Lewis structure.(a) N(b) C(c) Cl(d) Ararrow_forwardWrite Lewis dot symbols for the following atoms and ions: (a) I (b) I-(c) S(d) S2-(e) P (f) P3-(g) Na (h) Na+(i) Mg (j) Mg2+arrow_forward
- Na+ forms an “ionic bond” (i.e. an electrostatic attraction) with the OCN− ion. (a) Draw the full Lewis structure of the ionic compound. Be sure to show how you have derived this. (The ionic compound as a whole, not just OCN-) (b) Which atom in the OCN− anion is the sodium cation most likely to attract? Explain.arrow_forwardDraw Lewis diagrams for the following ions. In the formula the symbol of the central atom is given first. (Hint:The valence octet may be expanded for the central atom.)(a) BrO4 - (b) PCl6 - (c) XeF6+arrow_forwardWhich of the following statements are true regarding an ionic bond between cobalt and sulfur in a CoS formula unit? (a) Cobalt ions and sulfide ions bond by electrostatic attraction. (b) Cobalt atoms gain electrons and sulfur atoms lose electrons. (c) The ionic radius of a cobalt ion is greater than its atomic radius. (d) Breaking an ionic bond between cobalt and sulfur requires energy.arrow_forward
- How many covalent bonds are normally formed by each element? (a) N (b) F (c) C (d) Br (e) Oarrow_forwardWhich compounds have nonpolar covalent bonds, which have polar covalent bonds, and which have ions? (a) LiF (b) CH3F (c) MgCl2 (d) HClarrow_forwardClassify the bond formed between each pair of atoms as covalent, polar covalent, or ionic.(a) Sr and F (b) N and Cl (c) N and Oarrow_forward
- Which pair of elements has maximum electronegativity difference? (a) Li and F (c) Na and Br (b) Na and F (d) Na and Clarrow_forwardA compound is being tested for use as a rocket propellant. Analysis shows that it contains 18.54% F, 34.61%Cl, and 46.85% O.(a) Determine the empirical formula for this compound.(b) Assuming that the molecular formula is the same asthe empirical formula, draw a Lewis diagram for thismolecule. Review examples elsewhere in this chapterto decide which atom is most likely to lie at thecenter.(c) Use the VSEPR theory to predict the structure of themolecule from part (b).arrow_forwardWrite Lewis formulas, including unshared pairs, for each of the following. Carbon has four bonds in each compound. (a) Propane (C3H8) (c) Methyl fluoride (CH3F) (b) Methanol (CH4O) (d) Ethyl fluoride (C2H5F)arrow_forward
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