Explanation The elements are arranged in a specific way in Periodic table. The first and foremost arrangement in periodic table is done by considering only the atomic number. This is because atomic number is the total number of protons that is present in nucleus of the atom. This is unique for each and every element. Hence the arrangement of elements in the periodic table is done by the atomic number. By knowing the atomic number of an element the position of an element in periodic table can be determined. From the position of the unknown element, the properties of the same can be guessed accurately even before discovery. Periodic table includes all the known elements. The elements are arranged in a way that they reveal regularities in occurrence of elements with similar properties. The Group VIIA elements are known as halogens. The halogen atom has a total of seven valence electrons in its outermost shell...

16th Edition

ISBN: 9780077862619

Author: KRAUSKOPF, Konrad B. (konrad Bates), Beiser, Arthur

Publisher: Mcgraw-hill Education,

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The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways:

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Chapter 10, Problem 23MC

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2. Use the electrostatic model to calculate the energy (in kJ mol") required to break an 0...H hydrogen bond in a vacuum (er = 1) and in water (er 80.0). Let the O...H distance be 170 pm, and partial charges on the H and O atoms be +0.42e and -0.84e, respectively.

4) Molybdenum has a BCC crystal structures, the density of molybdenum is 10.22 g/cm³ and its atomic mass is 95.94 g/mol. What are the atomic concentration, the lattice parameter a and the atomic radius of molybdenum. What is the atomic concentration in the primitive cell? 5) Tungsten (W) has the BCC crystal structure. The radius of the W atom is 0.1371 nm. The atomic mass of W is 183.8 amu (g/mol). Calculate the number of W atoms per unit volume and the density of W (NA = 6.02 x 10²3).

Metals are good electrical conductors hence electrons on the surface of a conductor will arrange themselves such that the electric field TO A IS shielded from external charges. OB. inside cancels to zero. OC. tends toward a state of minimum energy. D. follows the inverse-square law.

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Solution Summary: The author explains that the correct option is "d. lacks one electron of having a filled outer shell". The atomic number determines the position of an element in periodic table.

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