10. one of the first models of the atom was proposed by niels bohr. in his model, electrons existed in basic energy levels called * a. rows b. orbits c. families d. orbitals 11. what does the principal quantum number indicate about a given electron? * a. the shape of the electron cloud. b. the direction the electron is spinning. c. the speed of the electron. d. he general energy level of the electron. 12. when an electron drops down from an excited state to its ground state, the electron * a. doubles its energy b. moves away from the nucleus c. gives off energy in the form of light d. absorbs additional quantas of energy
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Chemistry, 22.06.2019 14:30, Dreynolds1667
100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)
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Chemistry, 22.06.2019 15:30, lovebaeforlife351
Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins. co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)
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Chemistry, 22.06.2019 23:30, jade468
Substance a is a nonpolar liquid and has only dispersion forces among its constituent particles. substance b is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles. when substance a and b are combined, they spontaneously mix.
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Chemistry, 23.06.2019 01:30, sanchezvazquez0123
In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?
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10. one of the first models of the atom was proposed by niels bohr. in his model, electrons existed...
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