Part B Mendeleev placed thallium (TI) in the same group as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). However, the modern periodic table doesn't place thallium in this group. Use the periodic table to find the properties of thallium. Explain why Mendeleev might have grouped thallium in the same group as lithium and sodium. Also explain how thallium is different from the other five elements. В I U x Font Sizes 三星 E三三囲。 X, A - A Characters used: 0/ 15000 V 5:57 !!!

Part B Mendeleev placed thallium (TI) in the same group as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). However, the modern periodic table doesn't place thallium in this group. Use the periodic table to find the properties of thallium. Explain why Mendeleev might have grouped thallium in the same group as lithium and sodium. Also explain how thallium is different from the other five elements. В I U x Font Sizes 三星 E三三囲。 X, A - A Characters used: 0/ 15000 V 5:57 !!!

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Explain why the ionization energy of sodium (Na) is less than the ionization energy of lithium (Li). In your explanation discuss the atoms' structure: energy levels (rings), protons, and/or valence electrons.
Given the following information, determine which element of the periodic table is being described as element “X.” Report your answer. Explain your reasoning by addressing each piece of evidence given. a. Element “X” is not a gas at room temperature and is best described as a metal in its only allotrope (elemental form). b. When element “X” forms a cation, its atomic radius is smaller than that of neon (Ne) however, it is notable that element “X” does not form anions as partners in ionic compounds. c. The 1st ionization energy of element “X” is greater than that of atomic aluminum (Al). d. When element “X” is degraded in the presence of hydrogen chloride (HCl), a reaction ensues leaving an amorphous colorless substance. When analyzed, this substance is found to have formed in a 1:2 mole ratio of element “X” : chlorine. Once refined, this substance is useful as a cofactor in the PCR process for DNA amplification.
Can you answer part B
Which pair of elements do you expect to be most similar? Why?a) N and Nib) Mo and Snc) Na and Mgd) Cl and Fe) Si and P
Does any element with Z ≤ 92 match the description? An alkali metal with a lower atomic number than beryllium.
Consider two different elements, element 1 and element 2. Element 1 has both a smaller radius and a smaller molar mass than element 2. What accounts for their differences in radius?
Write the electron configuration for cobalt (atomic number 27).
25. Select the correct statement. Nat and Kt,are isoelectronic because they both lost one electron and are in Group 1A. a) b) Ar and K* are isoelectronic because they both have 18 electrons. c) Na and Mg are isoelectronic because they both are in the third period. d) Cat and Ca2+ are isoelectronic because theylboth are charged atoms of calcium and lost electrons.
A chemical reaction occurs in three stages. Each stage consists of a mix of positively and negatively charged elements. Some of those elements react by bonding together, but each pair can only consist of 1 negatively charged and 1 positively charged element. Some elements can exist by themselves without bonding with other elements. In the chemical reaction, there are 8 elements (Z, Y, X, W, V, U, T, S). In the first reaction, two pairings were made: Z bonded to T, and U bonded to X. In the third reaction, V bonded to S. The reaction only consisted of three negatively charged elements. Which of the following statements is false? Pick ONE option Y must be positively charged V must be positively charged W must be positively charged T, X, and S could possibly be negatively charged OT, X, and 5 could possibly be positively charged ►
Classify each element below as belonging to the representative elements, transition elements, or inner transition elements. Thorium (Th) Magnesium (Mg) Copper (Cu)
Place the following elements in order of increasing covalent radius (i.e., from smallest to largest): Aluminum (Al) Boron (B) Fluorine (F) Helium (He) Potassium (K)
Elements in group 7A are considered alkali metals O noble gases halogens