6. why does the electron cloud model show electrons as a \cloud\ instead of exact paths?

7. what does the electron cloud represent about where an electron is most likely to be found?

8. what happens to electrons when a plastic strip is rubbed between your fingers?

9. why does the plastic become negatively charged and your skin positively charged?

10. why do two plastic strips repel each other after being rubbed?

11. in the balloon and paper example, why is the paper attracted to the balloon even though the paper is neutral?

Question

6. why does the electron cloud model show electrons as a \cloud\ instead of exact paths?

7. what does the electron cloud represent about where an electron is most likely to be found?

8. what happens to electrons when a plastic strip is rubbed between your fingers?

9. why does the plastic become negatively charged and your skin positively charged?

10. why do two plastic strips repel each other after being rubbed?

11. in the balloon and paper example, why is the paper attracted to the balloon even though the paper is neutral?

Accepted Answer

### Question 6
# Brief Explanations:
According to quantum mechanics, electrons do not follow fixed, predictable paths (unlike the Bohr model's orbits). The electron cloud model is based on the Heisenberg uncertainty principle, which states that we cannot simultaneously know an electron's exact position and momentum. So, instead of exact paths, we represent the region where electrons are likely to be found as a "cloud" to show the probability distribution of electron positions.
# Answer:
Because electrons' positions and momenta can't be precisely known (Heisenberg uncertainty principle), so their locations are shown as a probability - based cloud rather than exact paths.

### Question 7
# Brief Explanations:
The electron cloud represents the region around the nucleus where an electron is most likely to be found. The density of the cloud (how "thick" it is in a particular area) corresponds to the probability of finding the electron there. Areas with a higher - density cloud have a greater probability of containing the electron.
# Answer:
The electron cloud represents the region (around the nucleus) where an electron is most likely to be found, with cloud density related to the probability of electron presence.

### Question 8
# Brief Explanations:
When a plastic strip is rubbed between fingers, a process called triboelectric charging occurs. The plastic strip and the skin (fingers) have different electron - affinities. The plastic strip has a relatively high electron - affinity, so electrons from the skin (fingers) are transferred to the plastic strip.
# Answer:
Electrons are transferred from the skin (fingers) to the plastic strip.

### Question 9
# Brief Explanations:
During the rubbing process, the plastic strip gains electrons (since it has a higher electron - affinity than the skin). Electrons are negatively charged, so gaining electrons makes the plastic strip negatively charged. The skin (fingers) loses electrons, and since protons (positive charges) in the skin's atoms are now in excess of electrons, the skin becomes positively charged.
# Answer:
The plastic gains electrons (becomes negative), and the skin loses electrons (becomes positive) due to different electron - affinities during rubbing.

### Question 10
# Brief Explanations:
After being rubbed, both plastic strips acquire the same type of charge (negative, in this case, since they both gain electrons from the skin during rubbing). According to the principle of electric charges, like charges repel each other. So the two plastic strips, having the same negative charge, repel one another.
# Answer:
Both strips gain the same (negative) charge during rubbing, and like charges repel each other.

### Question 11
# Brief Explanations:
When the balloon is charged (e.g., negatively charged after rubbing), it causes a redistribution of charge in the neutral paper. The side of the paper closer to the balloon will have charges of the opposite sign (positive charges in the case of a negatively charged balloon) induced on it due to electrostatic induction. The attractive force between the charged balloon and the induced opposite charges on the paper is stronger than the repulsive force between the balloon and the like charges (which are farther away in the paper), resulting in a net attractive force.
# Answer:
The charged balloon induces a charge separation in the neutral paper, with opposite charges on the near side. The attractive force between the balloon and these induced opposite charges is stronger than the repulsive force with like charges (far side), leading to attraction.

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