Concept explainers
Interpretation: From the given options the correct option that contains species that are arranged in the increasing order of their atomic radius should be determined.
Concept Introduction:
Atomic radius:
Atomic radius is the distance between the atomic nucleus and outermost electron of an atom. From the atomic radius, the size of atoms can be visualized. But there is no specific distance from nucleus to electron due to electron cloud around the atom does not have well-defined boundary.
Periodic Table: The available chemical elements are arranged considering their atomic number, the electronic configuration and their properties. The elements placed on the left of the table are metals and non-metals are placed on right side of the table.
In periodic table the horizontal rows are called periods and the vertical column are called group. There are seven periods and 18 groups present in the table and some of those groups are given particular name as follows,
Mass number: It is given by the total number of protons and the neutrons present in the nucleus of the element and it is denoted by symbol A. The subscript that lies on the left side of the symbol of the element represents the mass number.
Cation: Removal of electron from the atom results to form positively charged ion called cation.
Anion: Addition of electron to atom results to form negatively charged ion called anion.
The net charge present in the element denotes the presence or absence of electrons in the element.
In periodic table the horizontal rows are called periods and the vertical column are called group.
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Chapter 4 Solutions
Chemistry: Atoms First
- 2-89 Assume that a new element has been discovered with atomic number 117. Its chemical properties should be similar to those of astatine (At). Predict whether the new element’s ionization energy will be greater than, the same as, or smaller than that of: (a)At (b)Raarrow_forward2-44 Which period(s) in the Periodic Table contain(s) more nonmetals than metals? Which contain(s) more metals than nonmetals?arrow_forwardArrange the following sets of ions in order of decreasing ionic radii. (a) Br, Cl¯, O², s²- 02 Br > Cl- (b) Cs+, Fr+, Rb+ Fr+ Rb+ Cs+arrow_forward
- Rank the ions in each set in order of increasing size, and ex-plain your ranking:(a) Li⁺, K⁺, Na⁺(b) Se²⁻, Rb⁺, Br⁻(c) O²⁻, F⁻, N³⁻arrow_forwardRank the ions in each of the following sets in order of decreasing size. (a) O Se2- O Se2- O Se2- Rb+ O Rb+ O Rb+ O Br- O Br O Br This answer has not been graded yet. (b) O Lit O Lit O Lit O Kt O K+ O K+ O Na+ O Na+ O Na+ This answer has not been graded yet. (c) O Sr2+ O sr2+ O Sr2+ О Ва2+ O Ba2+ O Ba2+ O Cs+ O Cs+ O Cst This answer has not been graded yet. Submit Answer O o oarrow_forwardRead the given expression. X= number of protons - number of core electrons Which of the following explains the identity of X and its trends across a period? OX is the effective nuclear charge, and it remains constant across a period. OX is the screening constant, and it remains constant across a period. OXis the effective nuclear charge, and it increases across a period. OX is the screening constant, and it increases across a period.arrow_forward
- (a) Which ion is smaller, Co3+ or Co4+? (b) In a lithium-ionbattery that is discharging to power a device, for every Li+that inserts into the lithium cobalt oxide electrode, a Co4+ion must be reduced to a Co3+ ion to balance charge. Using the CRC Handbook of Chemistry and Physics or other standardreference, find the ionic radii of Li+, Co3+, and Co4+. Orderthese ions from smallest to largest. (c) Will the lithium cobaltoxide cathode expand or contract as lithium ions areinserted? (d) Lithium is not nearly as abundant as sodium.If sodium ion batteries were developed that function in thesame manner as lithium ion batteries, do you think “sodiumcobalt oxide” would still work as the electrode material?Explain. (e) If you don’t think cobalt would work as the redox-active partner ion in the sodium version of the electrode,suggest an alternative metal ion and explain your reasoning.arrow_forwardBefore Mendeleev published his periodic table, Döbereiner grouped elements with similar properties into “triads,” in whichthe unknown properties of one member could be predicted byaveraging known values of the properties of the others. To test this idea, predict the values of the following quantities:(a) The atomic mass of K from the atomic masses of Na and Rb(b) The melting point of Br₂ from the melting points of Cl₂(-101.0°C) and I₂(113.6°C) (actual value -7.2°C)arrow_forwardList the following ions in order of increasing radius. (Use the appropriate <, =, or > symbol to separate substances in the list.) Na+, Te2−, Li+, Br−arrow_forward
- Among Cl-, Ar, K+, Ca2+, Br-, Kr, Rb+, and Sr2+, which one has the largest radius?arrow_forwardArrange the following sets of ions in order of decreasing ionic radii. (a) Br,I, S² , Se²- (b) Ba2+, Ca?+ Sr²+arrow_forwardEach of the following sets contains isoelectronic ions (ions containing the same number of electrons). Select the set that shows the correct trend in increasing size or increasing ionic radius. (A) O2– < F– < Na+ < Mg2+ ; (B) F– < O2– < Mg2+ < Na+; (C) Mg2+ < Na+ < F– < O2–; (D) Mg2+ < Na+ < F– < O2–;arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning