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enot [183]
3 years ago
9

Why is the magic number of an atom 8?

SAT
1 answer:
Nezavi [6.7K]3 years ago
7 0
In nuclear physics, a magic number is a number of nucleons such that they are arranged into complete shells within the atomic nucleus.
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There are clouds forming over Florida. The temperatures in the clouds and in the air are above freezing. Which form of precipita
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Rain

Explanation:

In certain temperatures, water droplets freeze

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Liturgical worship is important
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Yes

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Which of the following species has the same number of protons as fe³⁺?
mafiozo [28]

The number of protons in an element is the atomic number of the element, and it is not affected by the charge on the element. Hence, the species which has similar Number of proton is Fe²⁺

To know the species which the same number of protons as Fe³⁺, we need to obtain the <em>atomic number of the elements on the periodic table</em> :

  • Fe³⁺, Atomic number = 26; Number of protons = 26

  • Mn³⁺, Atomic number = 25; Number of protons = 25

  • Co²⁺, Atomic number = 27; Number of protons = 27

  • Fe²⁺, Atomic number = 26; Number of protons = 26

  • Ni, Atomic number = 28; Number of protons = 28

Therefore, only Fe²⁺ has the same number of protons as Fe³⁺

Learn more :brainly.com/question/18631164

5 0
2 years ago
A survey found that​ women's heights are normally distributed with mean
zheka24 [161]

Answer:

a. 99.30% of the woman meet the height requirement

b.  If all women are eligible except the shortest​ 1% and the tallest​ 2%, then height should be between 58.32 and 68.83

Explanation:

<em>According to the survey</em>, women's heights are normally distributed with mean 63.9 and standard deviation 2.4

a)

A branch of the military requires​ women's heights to be between 58 in and 80 in. We need to find the probabilities that heights fall between 58 in and 80 in in this distribution. We need to find z-scores of the values 58 in and 80 in. Z-score shows how many standard deviations far are the values from the mean. Therefore they subtracted from the mean and divided by the standard deviation:

z-score of 58 in= z=\frac{58-63.9}{2.4} = -2.458

z-score of 80 in= z=\frac{80-63.9}{2.4} = 6.708

In normal distribution 99.3% of the values have higher z-score than -2.458

0% of the values have higher z-score than 6.708. Therefore 99.3% of the woman meet the height requirement.

b)

To find the height requirement so that all women are eligible except the shortest​ 1% and the tallest​ 2%, we need to find the boundary z-score of the

shortest​ 1% and the tallest​ 2%. Thus, upper bound for z-score has to be 2.054 and lower bound is -2.326

Corresponding heights (H) can be found using the formula

2.054=\frac{H-63.9}{2.4}  and

-2.326=\frac{H-63.9}{2.4}

Thus lower bound for height is 58.32 and

Upper bound for height is 68.83

8 0
3 years ago
Caffeine content in a 5-ounce cup of brewed coffee ranges from 60 to 180 mg, depending on brew time, coffee bean type, and grind
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Answer:

idk

Explanation:

I see us in the park strolling in the summer haze...

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