Before 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)

Q: A main group element with the valence electron configuration 2s22p3 is in periodic group__________…

A: Given electronic configuration is 2s22p3

Q: Please calculate, how many atoms exist in 1cm^3 of copper with the density 8,93 gr/cm^3 and the…

A: 1 cm3 of copper with the density 8.93 g/cm3, whose number of atoms is to be determined.

Q: Atomic Radii of the First 86 Elements 300 250 200 150 50 10 Atomic Number .Whais tha ganora trond…

A: As per our guidelines we can only solve first three sub-parts. Please resubmit the other questions…

Q: 6 The elements of the Periodic Table are created by a variety of processes discussed in the…

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A:

Q: 7.83 Referring to the periodic table, name (a) the halogen inthe fourth period, (b) an element…

A: Since you have posted multiple sub-parts, the answer for first three sub-parts are given below.…

Q: charge

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Q: Ca or Ga? Which element is expected to have the larger 1st ionization energy and why?

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Q: A main group element with the valence electron configuration 4s24p4 is in periodic group ______ .It…

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Q: Write the name of element and classify it as a metal, nonmetal, or metalloid. Ba

A:

Q: (a) Are the elements calcium, barium, and radium in the same group or same period in the periodic…

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Q: Explain the organization of an atom of carbon.

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Q: 1.4 39.6 2.45 1000 100 10 0.1 AU, (MJ/moI) #of electrons

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Q: Which element has the largest atomic radius? explain your answer in a separate sheet. O H O F O Na

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A:

Q: Little is known about the properties of astatine, At, becauseof its rarity and high radioactivity.…

A: Due to Astatine high radioactivity, very less information we are having:     a)  Astatine is solid…

Q: a ) Eva l u a te t h e expre s s i o n s 2 x 1, 2 x (1 + 3),2 x(1 + 3 + 5), and 2 x (1 + 3 + 5 + 7).…

A: In the expression, the total number of valence electron is calculated in which 2 is the number of…

Q: 1- The successive ionization energies of some element are I, = 589.5 kJ/mol, I, = 1145 kJ/mol, Iz =…

A: answer - option - e. As

Q: Place the following in order of decreasing metallic character P As K

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Q: 8.48 (a) Why do successive IEs of a given element always in- crease? (b) When the difference between…

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Q: Classify each element in the fourth row of the periodic table as a metal, nonmetal, or metalloid.

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A:

Q: Consider the stable elements through lead (Z = 82). Inhow many instances are the atomic weights of…

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Q: Write the name of element and classify it as a metal, nonmetal, or metalloid. Sb

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Q: 4. As you move across the periodic table, from left to right, (A) do the atoms get smaller or…

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Q: Among Cl-, Ar, K+, Ca2+, Br-, Kr, Rb+, and Sr2+, which one has the largest radius?

A: Isoelectronic species are those species which have same number of electrons in them. And the radius…

Q: ving: Why are the elements' atomic masses not in strict increasing order in the periodic table even…

A: As per the policy, we are only allowed to answer only 1st question. To get the answer of other…

Q: Give answers of the following. a. Which halogen is used for treating domestic water supplies and…

A: Chlorine(Cl) is used for treating domestic water supplies and swimming pool water. Chlorine is added…

Q: xplain the characteristics of Group X elements

A: This question is related to alkali metals.

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Q: From the following list of elements—Ar, H, Ga, Al, Ca, Br, Ge, K,O—pick the one that best fits each…

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Q: 5. Placed the elements N, O, As, Se in order from least to greatest atomic radius. a. N<0<As < Se b.…

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Q: Which of the following properties have a tendency to increase with increasing of atomic number in a…

A: Since you have asked multiple questions,we will solve first question for you.If you want any…

Q: The sum of IE1through IE₄ for Group 4A(14) elements shows a decrease from C to Si, a slight increase…

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Q: Arrange in order of increasing nonmetallic character. (Use the appropriate symbol to separate…

A: Non metallic character : It is the tendency of elements to gain electron and form negative ions…