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Shalnov [3]
3 years ago
12

How many electrons can be present in an atom having three principal energy levels? *

Chemistry
2 answers:
Sergio [31]3 years ago
7 0

Answer:

18 electrons

Explanation:

The third principal energy level has one s orbital, three p orbitals, and five d orbitals, which can each hold up to 10 electrons. This allows for a maximum of 18 electrons. The fourth and higher levels have an f sublevel in addition to the s, p, and d orbitals.

saveliy_v [14]3 years ago
5 0

Answer:

18 electrons

Explanation:

The five d orbitals can hold up to 10 electrons. Thus, the third level holds a maximum of 18 electrons: 2 in the s orbital, 6 in the three p orbitals, and 10 in the five d orbitals.

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D= mass/volume so it's 100/68 which equals 1.47cm3
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Two or more substances that are blended together but not chemically combined make up a(n) _____.
Dahasolnce [82]
Make up a mixture.

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But if it elements are chemically combined a compound would be formed.
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Total water content in the earth remains constant. comment upon the following​
NARA [144]

Answer:

The total water content in the earth remains nearly constant.

Explanation:

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What is evaporation? Describe what happens at the molecular level during evaporation.
jasenka [17]
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3 years ago
Before entering the cyclotron, the particles are accelerated by a potential difference V. Find the speed v with which the partic
vesna_86 [32]

Answer:

Speed, v=\sqrt{\dfrac{2qV}{m}}

Explanation:

The device which is used to accelerate charged particles to higher energies is called a cyclotron. It is based on the principle that the particle when placed in a magnetic field will possess a magnetic force. Just because of this Lorentz force it moves in a circular path.  

Let m, q and V are the mass, charge and potential difference at which the particle is accelerated.

The work done by the particles is equal to the kinetic energy stored in it such that,

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v=\sqrt{\dfrac{2qV}{m}}

So, the speed with which the particles enter the cyclotron is v=\sqrt{\dfrac{2qV}{m}}. Hence, this is the required solution.

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