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k0ka [10]
3 years ago
9

How is the atomic number of a nucleus changed by alpha decay?

Physics
1 answer:
GarryVolchara [31]3 years ago
4 0

Answer:

The atomic number of a nucleus will go down by two in alpha decay

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On a smooth horizontal floor, an object slides into a spring which is attached to another mass that is initially stationary. Whe
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Answer: (E) Momentum and mechanical energy

Explanation:

 The momentum and the mechanical energy is basically conserved during the given interaction process as the forces on the given system are in the form of internal nature and then the momentum are get conserved.

According to the given question, on the smooth floor when an object are slides by using the spring then the momentum and the mechanical energy are conserved.

The mechanical energy is the combination of both the kinetic and the potential energy that is used for doing some amount of work. Therefore, Option (E) is correct answer.  

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11) Which statement about covalent bonds is true? A) Covalent bonds are generally weaker than ionic bonds because they form full
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<h3><u>Answer;</u></h3>

C) Covalent bonds are generally weaker than ionic bonds because they overlap electrons to fill their outer shell.

<h3><u>Explanation;</u></h3>
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  • <em><u>The amount of energy required to break an given bond determines how strong a particular bond is.</u></em> Ionic bonds require more energy to break as compared to covalent bond and therefore they are stronger than the covalent bonds.
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