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posledela
2 years ago
12

Perform the following mathematical operation and report the answer to the correct number of significant figures 143.6/21.2

Physics
1 answer:
jekas [21]2 years ago
8 0

Answer:

143.6/21.2

=6.773584906

=6.8

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I just need a full answer here not only so I can answer the question, but also so that I can learn.
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Answer: Number of valence electrons determine how fast or easy for an atom to gain stability. Either by gaining electrons or by losing electrons.

Group one and seven elements react fast because they only have one electron to gain or lose.

Explanation:

Number of valence electrons tell us the number of electrons an atom will gain or lose in order to attain stability in electron configuration.

All the elements in a particular group will have the same number of valence electrons as follows:

Group one - 1 valence electron

Group two - 2 valence electrons

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Group five - 3 valence electrons

Group six - 2 valence electrons

Group seven - 1 valence electron

Group eight - 0 valence electron

Some elements are more reactive than the others because of the electron affinity, oxidation state and electronegativity of the atoms

For instance, elements in group 7 are more reactive than others because of their oxidation state and they have very high electronegativity.

Also, group one elements are more reactive because they only have one electron to loose.

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Color is what scientist use to determine the temperature of a star!

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3 years ago
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Rom4ik [11]

Answer:

D. 53°

Explanation:

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3 years ago
20 Accelerated motion is represented by a<br> line on a nonlinear distance time graph.
Varvara68 [4.7K]

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Acceleration of motion is represented by a curved line on a non-linear distance-time graph.

The acceleration of a non-linear motion is depicted using a parabola which is a curve. This implies that the velocity is constantly changing and the distance covered by the body is also changing with equal amount of time.

  • A plot of this will give a parabola. This can be further established using one of the equations of motion below:

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Acceleration brainly.com/question/10932946

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D. Move 12 m west and then 8 m east; the displacement is 4 m and the distance is 20 m
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3 years ago
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