Concept explainers
(a)
Interpretation:
Based on principles of writing electronic configuration, write the correct condensed electronic ground state configuration for
Rb
Concept introduction:
The electronic configuration is based on the following rules
- Pauli’s exclusion principle (no two electrons in the same element can have all the four quantum numbers same)
- Hund’s rule of multiplicity ( the electrons are first filled in all the degenerate orbitals and then pairing starts)
- Pauli’s exclusion principle (the electrons are filled based on the energy of orbitals)
(b)
Interpretation:
Based on principles of writing electronic configuration, write the correct condensed electronic ground state configuration for
Sr
Concept introduction:
The electronic configuration is based on the following rules
- Pauli’s exclusion principle (no two electrons in the same element can have all the four quantum numbers same)
- Hund’s rule of multiplicity ( the electrons are first filled in all the degenerate orbitals and then pairing starts)
- Pauli’s exclusion principle (the electrons are filled based on the energy of orbitals)
(c)
Interpretation:
Based on principles of writing electronic configuration, write the correct condensed electronic ground state configuration for
Br
Concept introduction:
The electronic configuration is based on following rules
- Pauli’s exclusion principle (no two electrons in same element can have all the four quantum numbers same)
- Hund’s rule of multiplicity ( the electrons are first filled in all the degenerate orbitals and then pairing starts)
- Pauli’s exclusion principle (the electrons are filled based on the energy of orbitals)
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Chapter 2 Solutions
Introduction To General, Organic, And Biochemistry
- 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_forward2-91 These are the first two ionization energy for lithium: Li(g) Li+(g) + e-(g) Ionization energy = 523 kJ/mol Li+(g) Li2+(g) + e-(g) Ionization energy = 7298 kJ/mol (a) Explain the large increase in ionization energy that occurs for the removal of the second electron. (b) The radius of Li is 78 pm (1 pm = 10-12 m) while that of a lithium atom, Li, is 152 pm. Exp lain why the radius of Li is so much smaller than the radius of Li.arrow_forward2-47 Which element in each pair is more metallic? (a) Silicon or aluminum (b) Arsenic or phosphorus (c) Gallium or germanium (d) Gallium or aluminumarrow_forward
- 2-104 The average atomic weight of lithium is 6.941 amu. The two naturally occurring isotopes of lithium have the following masses: 6Li, 6.01512 amu; 7Li, 7.01600 amu. Calculate the percent abundance of 6Li and 7Li in naturally occurring lithium.arrow_forward2-102 An element consists of 90.51% of an isotope with a mass of 19.992 amu, 0.27% of an isotope with a mass of 20.994 amu, and 9.22% of an isotope with a mass of 21.990 amu. Calculate the average atomic mass and identify the element.arrow_forward2-12 The elements game, Part 1. Name and give the symbol of the element that is named for each person. (a) Niels Bohr (1885—1962), Nobel Prize for physics in 1922 (b) Pierre and Marie Curie, Nobel Prize for chemistry in 1903 (c) Albert Einstein (1879—1955), Nobel Prize for physics in 1921 (d) Enrico Fermi (1901—1954), Nobel Prize for physics in 1938 (e) Ernest Lawrence (1901—1958), Nobel Prize for physics in 1939 (f) Lise Meitner (1868—1968, codiscoverer of nuclear fission (g) Dmitri Mendeleyev (1834—1907), first person to formulate a workable Periodic Table h) Alfred Nobel (1833—1896), discoverer of dynamite (i) Ernest Rutherford (1871—1937), Nobel Prize for chemistry in 1908 (j) Glen Seaborg (1912—1999), Nobel Prize for chemistry in 1951arrow_forward
- 2-67 Account for the fact that the first ionization energy of oxygen is less than that of nitrogen.arrow_forward2-94 Using your knowledge of trends in element sizes in going across a period of the Periodic Table, exp lain why the density of the elements increases from potassium through vanadium. (Recall from Section 1-7 that specific gravity is numerically the same as density but has no units.) Element Specific Gravity K 0.862 Ca1.55 Se 2.99 Ti 4.54 V 6.11arrow_forward2-101 Complete the following table: Symbol Atomic number Atomic weight Mass number # of protons # of neutrons # of electrons H 0 Li 4 3 Al 26 58 78 17 20arrow_forward
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