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dexar [7]
3 years ago
9

What element has 5 valence electrons and is in period 3.

Physics
1 answer:
Maru [420]3 years ago
5 0

Answer:

Phosphorous

Explanation:

it is the fifth element from the left and it is in the third period so it has 5 valence electrons

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A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket a light suddenly flashes. To an obs
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Answer:

B. the light will reach the front of the rocket at the same instant that it reaches the back of the rocket.

Explanation:

To an observer at rest in the rocket who can't see either sides of the rocket, the speed of the light is constant which means the distance to the front or the back is same and would appear to reach the rocket at the same time.

Although from the point of view of the person on the earth, the front of the rocket is travelling in opposite direction of the light while the back of the rocket is moving closer to the light. This means that the distance travelled by the light going forward will be longer going backwards. And since the speed of light is constant in both directions, the light will reach the back of the rocket before it reaches the front  for the observer on the earth.

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3 years ago
Ana walks from 4 m to 200 cm. Which of the following statements is true about
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3 years ago
un tanque de gasolina de 40 litros fue llenado por la noche, cuando la temperatura era de 68 grados farenheit. Al dia siguiente
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Answer:

Volume of gasoline that expands and spills out is 1.33 ltr

Explanation:

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