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Alborosie
3 years ago
15

Which of the following correctly orders the

Chemistry
1 answer:
erik [133]3 years ago
8 0

The history of the atom passed through a certain sequence until our recent interpretation of atomic theory.

The correct sequence of atomic theory is;

  • The atom at electrons stuck in an overall  positive atom
  • The atom has a small dense positive  nucleus.
  • Electrons exist in perfect orbits based on  energy levels.
  • Electrons exist in orbitals, or the most  probable location

The beginning of the atomic theory saw the discovery of J.J Thompson which led to the plum - pudding model in which the atom was described as a sphere in which electrons are stuck in an overall  positive atom.

This was followed by Rutherford's planetary model in which he concluded that the atom has a small dense positive  nucleus. This was followed by the model of Bohr in which the electrons exist in perfect orbits based on  energy levels.

Lastly, the contemporary model of the atom is called the wave - mechanical model in which electrons exist in orbitals, or the most  probable location.

Learn more: brainly.com/question/14156701

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How many moles of dinitrogen tetroxide (N2O4) are in 6.49 x 109 particles?
yan [13]

Answer: There are 1.08 \times 10^{-14} moles N_{2}O_{4} present in 6.49 \times 10^9 particles.

Explanation:

According to the mole concept, 1 mole of a substance contains 6.022 \times 10^{23} particles.

Hence, number of moles present in 6.49 \times 10^9 particles are calculated as follows.

No. of moles = \frac{6.49 \times 10^9}{6.022 \times 10^{23}} mol

                      = 1.08 \times 10^{-14} mol

Thus, there are 1.08 \times 10^{-14} moles N_{2}O_{4} present in 6.49 \times 10^9 particles.

6 0
3 years ago
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How much energy is involved to cool 16.2 g of steam at 115.0°C to -2.00°C?
love history [14]

Explanation:

think its specific heat of water = 4.18 J/g°Ci

6 0
3 years ago
In any engineering design problem, the first step is to understand the problem and identify one or more possible solutions. In t
Semenov [28]

Answer:

rising pressure and decreasing temperature

Explanation:

Reversible reactions have a bit practical interest, but in some cases the technological benefit or profitability of production requires a shift in the equilibrium of a reversible reaction.

Increasing pressure

With increasing pressure on this system, the concentration of substances increases. In this case, the balance will shift towards smaller volumes. On the left side of the equation, two volumes of nitrogen react with one volume of hydrogen. On the right side of the equation there are two volumes of ammonia, i.e. the number of volumes on the right side of the equilibrium reaction is less than on the left and, therefore, with increasing pressure, the reaction equilibrium will shift to the right.

Decreasing temperature

When the temperature rises, the equilibrium shifts towards the endothermic reaction, and when the temperature decreases, towards the exothermic reaction and the reaction given above is the exothermic.

5 0
3 years ago
How can nuclear energy be converted in electrical energy
DaniilM [7]

Answer:

A clean energy resource

Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.

Explanation:

4 0
4 years ago
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Is americium a solid, liquid or gas
arsen [322]
Americium at standard temperature and pressure is solid. This element is a radioactive one and is a member of the actinide group. It was first produced by the group of Glenn T. Seaborg. It common application is in household smoke detectors. 
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