Physics, 18.08.2021 20:10 groverparham3
Oppositely charged objects attract each other. This attraction holds electrons in atoms and holds atoms to one
another in many compounds. However, Ernest Rutherford's model of the atom failed to explain why electrons were
not pulled into the atomic nucleus by this attraction.
What change to the atomic model helped solve the problem seen in Rutherford's model?
Bohr's work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels,
like standing on the rungs of a ladder.
O Bohr's work with cathode rays led him to say that the electrons were located within the mass of positive material,
like plums in a pudding.
O Thomson's work with cathode rays led him to say that the electrons were located within the mass of positive
material, like plums in a pudding.
O Thomson's work with atomic spectra led him to say that the electrons were limited to existing in certain energy
levels, like standing on the rungs of a ladder.
Answers: 3
Physics, 22.06.2019 05:10
Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.
Answers: 3
Physics, 22.06.2019 06:30
If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.
Answers: 3
Physics, 22.06.2019 18:00
Which missing item would complete this alpha decay reaction ? > 228/88ra + 4/2he a.224/96 rn b. 232/90 th c. 230/92 u d. 235/92 u
Answers: 2
Physics, 22.06.2019 22:00
Aspaceship starting from a resting position accelerates at a constant rate of 9.8 meters per second per second. how far will the spaceship travel if its final speed is 1 percent the speed of light (300,000,000 m/s)? a. 3.1 × 106 m b. 2.94 × 108 m c. 7.8 × 1010 m d. 4.6 × 1013 m
Answers: 1
Oppositely charged objects attract each other. This attraction holds electrons in atoms and holds at...
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