Following Rutherford, Niels Bohr developed an improved model of the atom in which the electrons moved around the nucleus in quantized energy shells. Which of the following phenomena could Bohr's model explain but Rutherford's model could not?
Group of answer choices:
spectral emission lines from hydrogen atoms
wave-particle duality of electrons
protons accounting for roughly half of an atom's mass
alpha particles passing through gold foil undeterred
Answers: 2
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Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.
Answers: 2
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An unknown solution has a ph of 7.2. which of these chemicals is likely to cause the greatest decrease in the ph of the solution when added to the solution? hf koh nh3 hno3
Answers: 2
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Ionic solids such as sodium chloride are easily shattered, but metallic solids such as copper can be easily bent and shaped. this difference occurs because a. ionic solids have low melting points b. atoms in metallic solids are not arranged in a regular pattern c. covalent bonding between sodium and chlorine keeps the solid rigid d. mobile electrons in the copper can shift without disrupting the solid
Answers: 1
Following Rutherford, Niels Bohr developed an improved model of the atom in which the electrons move...
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