What is the probability that an electron in the 1s state of a hydrogen atom will be found at a distance less than a/4 from the nucleus? Express your answer using three significant figures. ΜΕ ΑΣΦ P = ?
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- In the ground state of cadmium, Cd,a. how many electrons have l = 2 as one of their quantum numbers?b. how many electrons have n = 4 as one of their quantum numbers?c. how many electrons have ml = −1 as one of their quantum numbers?d. how many electrons have ms =-1/2 [as one of their quantum numbers?Polarizability is defined as the extent to which the electron cloud surrounding an atom or molecule can be distorted by an external charge. Rank the halogens (F2,Cl2,Br2,I2) and the noble gases (He,Ne, Ar, Kr, Xe) in order of polarizability (from least polarizable to most polarizable). What characteristics of these substances could be used to determine this ranked order?14- Which of the following is constant during Atomic Packing Factor (APF) calculation a. All of the above b. Volume of an atom c. Number of effective atoms per unit cell d. Volume of unit cell
- Which of the following have the same periodicity as the crystal lattice: a) electron wave function, b) electron distribution probability, c) lattice potentialQ: Not considering the many subatomic particles, name the three basic components of which atoms are made. What differences are there among the three? A: The three (3) basic components of which atoms are made, The ___________, which has a positive (+) electrical charge, and the _____________ , which has a neutral electrical charge, make up the nucleus. ___________ are particles of negative (-) electric charge which surround the nucleus in shells or orbitals.Why do quantum effects only happen on the atomic scale?
- Consider a system of nonrelativistic electrons in a white dwarf star at a temperature of 10^9 K. Very roughly, what would be their density if the system is degenerate? How does this compare with typical electron densities in ordinary matter of about 1030 electrons/m3?If the energy for Frenkel defect formation in Silver Chloride is 1.1 eV, the number of Frenkel defects at 350°C will be (density of AgCl is 5.50 g/cm^3, atomic masses of Ag & Cl are 107.87 g/mol & 35.45 g/mol, respectively) K=8.62 × 10^-5 eV/K) 6.56 × 10^23 /m^3 6.56× 10^23/m^3 8.24 × 10^23 /m^3 8.24× 10^23 /cm^34. Consider a binary alloy of A atoms and B atoms that can exist in a solid phase or a liquid phase. This alloy can also exist in TWO DIFFERENT PHASES SIMULTANEOUSLY: solid and liquid. The system is composed of one mole of atoms, some of which are A atoms and some of which are B atoms. Take GA and GB as the molar Gibbs free energy of pure A and pure B respectively. XA and XB are the molar fractions of A and B atoms respectively. The atoms crystallize in identical crystal structures when they are solid. (a) The starting conditions are such that a partition sits between the A atoms and B atoms so they do NOT mix. (i) Write an expression for the molar Gibbs free energy for the combination of pure components. (ii) Draw schematically how the molar Gibbs free energy of the combination of pure components varies with alloy composition.