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kotykmax [81]
3 years ago
14

Given the following electronic configurations, identify how many valence electrons each atom has.

Chemistry
2 answers:
ololo11 [35]3 years ago
4 0

Answer : Valence electrons in atom A = 1, B = 6 and C = 2.

Explanation :

Valence electrons means the outermost electrons are the ones which involved in bonding. Electrons are arranged in energy levels or shells.

Valence electrons are found in the highest energy orbitals of an element.

  • The electronic configuration of (Na) is 1s^22s^22p^63s^1. The highest energy orbital is 3s orbital which contains 1 electron. So,

        The number of valence electrons in (Na) = A = 1

Similarly,

  • The electronic configuration of (O) is 1s^22s^22p^4. The highest energy orbital are 2s and 2p orbitals which contains (2 + 4) = 6 electrons. So,

       The number of valence electrons in (O) = B = 6

  • The electronic configuration of (Fe) is 1s^22s^22p^63s^23p^64s^23d^6. The highest energy orbital is 4s orbital which contains 2 electrons. So,

       The number of valence electrons in (Fe) = C = 2

Papessa [141]3 years ago
3 0

correct answer would be 1,6, and 8 so a=1, 6, c=8.

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Answer: Option C

<u>Explanation: </u>

Nuclear reaction works on the principle of nuclear fission. The main functioning of nuclear reactor is the generation of neutrons by fission of Uranium oxide.

The rate of generation of neutrons need to be controlled in the reaction to have a controlled chain reaction which is suitable for generating electricity.

So, the controlling of rate of nuclear generation is done by moderators. The moderators are generally water or graphite in any nuclear reactor. So during these process, steam is produced in the reactor core which then flows through a turbine engine.

The steam rotates the turbines in the generator and thus the mechanical energy of the turbine during rotation is converted as the electrical energy in the generator.

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Option A

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