One bit of evidence that the quantum mechanical model is “correct” lies in the magnetic properties of matter. Atoms with unpaired electrons are attracted by magnetic fields and thus are said to exhibit paramagnetism. The degree to which this effect is observed is directly related to the number of unpaired electrons present in the atom. Consider the ground-state electron configurations for Li, N, Ni, Te, Ba, and Hg. Which of these atoms would be expected to be paramagnetic, and how many unpaired electrons are present in each paramagnetic atom?
Answer to relevant QuestionsWhich of elements 1–36 have two unpaired electrons in the ground state? The work function of an element is the energy required to remove an electron from the surface of the solid. The work function for lithium is 279.7 kJ/ mol (that is, it takes 279.7 kJ of energy to remove 1 mole of electrons ...In each of the following sets, which atom or ion has the smallest radius? a. H, He b. Cl, In, Se c. Element 120, element 119, element 117 d. Nb, Zn, Si e. Na-, Na, Na+ The electron affinities of the elements from aluminum to chlorine are 244 kJ/ mol, 2120 kJ/ mol, 274 kJ/ mol, 2200.4 kJ/ mol, and 2348.7 kJ/ mol, respectively. Rationalize the trend in these values. Diagonal relationships in the periodic table exist as well as vertical relationships. For example, Be and Al are similar in some of their properties, as are B and Si. Rationalize why these diagonal relationships hold for ...
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