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Alexeev081 [22]
3 years ago
12

Which change occurs when an atom in excited state returns to ground state? 1 energy is emitted 2energy is absorbed 3 the number

of electrons decreases 4 the number of electrons increases
Chemistry
2 answers:
kozerog [31]3 years ago
7 0
The answer is number 1 - energy is emitted


Energy is released when an atom in an excited state returns to the ground state.
blondinia [14]3 years ago
4 0

The correct option is this: ENERGY IS EMITTED.

An atom, which is in an excited state is an atom that has moved away from the ground level as a result of gaining energy. This type of atom has more energy compare to those in the ground state and it is also unstable. To return to the ground state, the atom has to emit the energy which it gained in the first instance. Thus, when an excited atom returns to the ground state, energy is always emitted.

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I need the 3 questions !!! About Rubidium (Rb) <br><br> ASAP PLEASE DUE IN LIKE 20 min
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Answer:

  1. 419kJ/mol  
  2. 5,0,0,+12
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Explanation:

1. Topic: Chemistry

ElementFirst Ionization Energy (kJ/mol) Lithium520Sodium496Rubidium403Cesium376According to the above table, which is most likely to be the first ionization energy for potassium?  

  • 536kJ/mol  
  • 504kJ/mol  
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2. Topic: Chemistry, Atom

The correct set of four quantum numbers for the valence electrons of the rubidium atom   (Z=37)  is:  

  • 5,1,1,+12  
  • 5,0,1,+12  
  • 5,0,0,+12
  • 5,1,0,+12

3. Rubidium and cesium are pyrophoric. Here the term pyrophoric means:

  • That hardly catches fire
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  • That catches fire spontaneously
  • None of these
5 0
3 years ago
What term is best described as the rate of a chemical reaction at any instant in time?
Fantom [35]

Answer:

instantaneous rate would be the term.

5 0
2 years ago
Which option draws the correct conclusion from the following case study?
trasher [3.6K]

Answer:

I believe the answer The case study was influenced by bias, and led to incorrect conclusions being drawn. plz correct me if I am wrong

Explanation:

4 0
3 years ago
Read 2 more answers
Arrange the following elements in order of decreasing ionization energy: Cl, Si, P, Ar *
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Answer:

Ar > Cl > P > Si.

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3 years ago
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