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UkoKoshka [18]
3 years ago
10

If an atom has 13 protons and is currently electrically neutral, what must happen to give the same atom a positive charge of +2e

?
Physics
1 answer:
Alex777 [14]3 years ago
5 0

The atom must lose 2 electrons

Explanation:

An atom consists of three types of particles:

- Protons, in the nucleus, with positive electric charge +e

- Neutrons, in the nucleus, with no electric charge

- Electrons, orbiting around the nucleus, with negative electric charge -e

As a result, the net electric charge of an atom is given by the number of protons minus the number of electrons:

Q = #p - #e

For a neutral atom, the number of protons and electrons is the same, so the net charge is zero.

In order for an atom to have a positive charge of +2, it means that there must be 2 protons more than the number of electrons. Since atoms exchange electrons (and not protons), this means that the atom must have "lost" 2 electrons.

In this problem, we have an atom with 13 protons: this means that initially it also has 13 electrons. However, later the atom lost 2 electrons, and as a result, the final charge is +2e.

Learn more about atoms:

brainly.com/question/2757829

#LearnwithBrainly

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13.6 N

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We assume the motion is downwards in the direction of the hanging block, M.

We now write equations of motion for each block.

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Mg - T = Ma    (1) and T - mgcos57 - F = ma where F is the frictional force on the block on the incline and a is their acceleration.

Now, since both blocks do not move, a = 0.

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So, Mg - mgcos57 = F  

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F = (M - mcos57)g

Since g = acceleration due to gravity = 9.8 m/s², and M = 2.94 kg and m = 2.85 kg.

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F = (2.94 kg - 2.85 kgcos57)9.8 m/s²

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F = (1.388 kg)9.8 m/s²

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