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Inessa05 [86]
3 years ago
14

Describe Bohr’s model of the atom consisted of a central

Chemistry
1 answer:
MariettaO [177]3 years ago
4 0

Answer:

The answer to this question is given below in the explanation section.

Explanation:

The Bohr model depicts an atom as a small, positively charged nucleus surrounded by electrons.These electrons travel in circular orbit around the nucleus similar in structure to the solar system,except electrostatic forces rather than gravity provide attraction.Electron orbit around the nucleus resembles that of planets around the sun in the solar system.

        The Bohr model was an improvement  on the earlier cubic model(1902),the plum pudding model(1904) the saturnine model (1904) the rutherford model (1911) since the Bohr model is a quantum physics based modification of the Rutherford may source combine the two:the Rutherford-Bohr model

Although revolutionary at the time,the Bohr model is a relatively primitive model of the hydrogen atom compared to the  valence shell atom.As an initial hypothesis it was derived as a first order approximation to describe the hydrogen atom.Due to its simplicity and correct results for selected systems.

In 913 Bohr suggested that electrons could only have certain classical motions:

  1. Electrons in atoms orbit the nucleus.
  2. The electrons can only orbit stably,without radiating in certain orbits at a certain discrete set of distances from the nucleus.These orbit are associated with definite energies and are also called energy shells or energy levels.
  3. Electrons can only gives or lose energy by jumping from one allowed orbit to another,absorbing or emitting electromagnetic radiation with a frequency (v) determined by the energy difference of the levels according to the plank relation.
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Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 8.60 MJ o
Alecsey [184]

Answer: 64.216\times 10^4grams of liquid sodium is required.

Explanation: To calculate the mass of liquid sodium, we use the formula:

q=nc\Delta T\\q=\frac{m}{M}c\Delta T

where,

q = heat required, 8.60MJ=8.60\times 10^6J   (Conversion factor: 1MJ = 1000000J)

m = Mass of liquid sodium, ?g

M = Molar mass of liquid sodium, 23g/mol

c = Specific heat capacity, 30.8J/Kmol

\Delta T = change in temperature,  \Delta T=(510-500)K=10K    (Conversion factor: 0°C = 273K)

Putting values in above equation, we get:

8.60\times 10^6J=\frac{m}{23g/mol}\times 30.8J/Kmol\times 10K

m=64.216\times 10^4grams

5 0
3 years ago
In an isolated system, two copper bars at different temperatures transfer energy until both are at the same temperature. How wou
rodikova [14]

B. Energy transfer would occur between the copper bars and the surroundings.

Explanation:

In an open system, energy transfer would occur between the copper bars and the surroundings.

There are three types of systems:

  • Isolated system in which matter and energy is not exchange with the surrounding.
  • Closed system there is no exchange of matter but energy is exchanged with the surrounding.
  • Open system: there is exchange of both matter and energy.

If the copper bars were placed in an open system matter and energy will be exchanged with the surrounding.

Learn more:

Isolated system brainly.com/question/7973509

#learnwithBrainly

4 0
3 years ago
C3H8O dissolved in water
nadya68 [22]

If C3H8O is dissolved in water, it would be expected to be a strong electrolyte.

<h3>What is a strong electrolyte?</h3>

A strong electrolyte is a solute or solution (already an electrolyte) that can completely dissociates in solution.

C3H8O is one of those compounds expected to be a strong electrolyte.

Thus, if C3H8O is dissolved in water, it would be expected to be a strong electrolyte.

Learn more about strong electrolytes here:  brainly.com/question/2285692

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2 years ago
Which of the following is an organic moleclue ?
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Answer:

water

Explanation:

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Which event will have the greatest impact on sea levels?
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Hello, Brainly User!

As the planet gets warmer, sea level rises for two reasons. First, warmer temperatures cause ice on land like glaciers and ice sheets to melt, and the melt water flows into the ocean to increase sea level. Second, warm water expands and takes up more space than colder water, increasing the volume of water in the sea.

Hope this helps, i was super glad and exited to help you out with this question! Have a great day..

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