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ExtremeBDS [4]
3 years ago
5

Suppose you discovered a new element with 120 protons and 2 electrons in its outer lever. In what group does this new element be

long
Physics
2 answers:
Mars2501 [29]3 years ago
7 0

Answer:

This new element belongs to the group 2.

Explanation:

In the periodic table, the vertical columns are called groups (or families). The elements in the same group share similar chemical and physical properties.

One of these properties is the same amount of outer valence electrons.

For example, in the group 1 the elements have 1 outer valence electron (If we assume that the element is in a neutral state which is without electrical charges).

If this new element has 2 electrons in its outer level it will belong to the group 2. The group 2 is well-known as alkaline earth metals.

For example, the magnesium (Mg) and the calcium (Ca) belong to the group 2.

Lyrx [107]3 years ago
5 0
Assuming the 2 valence electrons are of the neutral state of the new element, the element would belong in Group 2, the Alkaline Earth Metals.
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A 62.0-kg athlete leaps straight up into the air from a trampoline with an initial speed of 9.6 m/s. The goal of this problem is
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Answer:

2856.96 J

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\frac{1}{2}mv_i^2+mgh_i=\frac{1}{2}mv_f^2+mgh_f

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K=\frac{1}{2}mv^2\\\Rightarrow K=\frac{1}{2}\times 62\times 9.6^2\\\Rightarrow K=2856.96\ J

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The general equation

K_i+P_i=K_f+P_f\\\Rightarrow \frac{1}{2}mv_i^2+mgh_i=\frac{1}{2}mv_f^2+mgh_f

Half of maximum height

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The velocity of the athlete at half the maximum height is 6.78822 m/s

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