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Marianna [84]
3 years ago
14

The parents of a young child carefully placed plastic plug protectors in all the electrical outlets in their house. Which statem

ent best describes the role of the plastic protectors? (2 points)
A)Electricity is transported through wires, which are good conductors of electricity. To prevent the flow of electricity into other objects, a material that will prevent the flow of electricity from escaping the wires needs to be used. Certain types of plastics, which are good conductors, are one of many materials that can be used.
B)Electrical outlets contain metal wires that are good conductors of electricity. In order to promote electrical safety, the parents covered the outlets with plastic, an insulator that prevents electrical current from flowing to another object.
C)Plastic is a good conductor of electricity. Placing plastic covers over the electrical outlets allows the electrical current to be redirected back to the plug and ensures the safety of those around the outlets.
D)Plastics and metals are good conductors. This is why plastics can be used to prevent the flow of electricity from materials, like metal wires, to other objects. By preventing the flow of electricity, these help keep people safe.
Chemistry
2 answers:
crimeas [40]3 years ago
7 0

The answer is B) Electrical outlets contain metal wires that are good conductors of electricity. In order to promote electrical safety, the parents covered the outlets with plastic, an insulator that prevents electrical current from flowing to another object.

GREYUIT [131]3 years ago
5 0

The answer is B)Electrical outlets contain metal wires that are good conductors of electricity. In order to promote electrical safety, the parents covered the outlets with plastic, an insulator that prevents electrical current from flowing to another object.

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Consider the balanced chemical reaction below and determine the percent yield of sodium bromide if 2.36 moles of iron(iii) bromi
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Rank the following atoms in order of decreasing first ionization energies (i.e., highest to lowest): Li, Be, Ba, F.
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The order is:

F >Be >Li >Ba

Explanation:

Electrons are held in atoms by their  attraction to the nucleus which means that to remove an electron from the atom energy is needed.

The ionization energy is the minimum energy necessary to remove an electron from an atom in the gas phase and ground state, the electron removed being the outermost, that is, the furthest from the nucleus. The further away the electron is from the nucleus, the easier it is to remove it, that is, the less energy is needed.

By increasing the atomic number of the elements of the same group, the nuclear attraction on the outermost electron decreases, since the atomic radius increases. Then the ionization energy decreases. In other words, in a group it decreases from top to bottom because the size of the atom increases and it is easier to remove an external electron.

By increasing the atomic number of the elements of the same period, the nuclear attraction on the outermost electron increases, since the atomic radius decreases. Therefore, in a period, as the atomic number increases, the ionization energy increases. In summary, in a period it increases from left to right as the effective nuclear charge increases and it increases thanks to the decrease in the size of the atom.

Taking these considerations into account, the order is:

<u><em>F >Be >Li >Ba</em></u>

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