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vladimir1956 [14]
3 years ago
9

What are three types of beta decay

Chemistry
1 answer:
faltersainse [42]3 years ago
6 0
Beta minus and beta plus
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A carpet sells for 27.99 a square yard. What is the price of the carpet square per square meter ?
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There are 9 square meters in one square yard so divide 27.99 by 9

27.99/9=3.11

one square meter is $3.11

I hope I've helped!
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Which of the following elements is the least reactive metal? Sodium, Rubidium, Chlorine, and Magnesium.​
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First off chlorine is not a metal so you can ignore that one.

Sodium and Rubidium are in group 1 of the periodic table and Magnesium is in group 2.

Group one metals are more reactive than group two because it is harder for the group two metals to lose their 2 valence (outer most) electrons.

As you go down group 1 there is an increase in the reactivity this is because as you go down there is an increase in the atomic radius which leads to more shielding. This weakens the electrostatic forces of attraction making it easier to lose the outermost electrons, therefore they are more reactive.
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2 years ago
A student explained to the class that helium has 8 valence electrons because it is in group 18. Is the student correct?
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<span>The student is incorrect because helium has 2 valence electrons and it's in group 18 because the first energy level is full. Although helium is placed in Group 18 which generally has 8 valence electrons, it does not have 8 valence electrons as the student suggested. It was grouped together with the noble gases because it exhibits similar properties with them. </span>
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3 years ago
In fossil comparisons, it helps to know about similar:
omeli [17]

Answer:

Fossils tell us when organisms lived, as well as provide evidence for the Fossils are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils, by comparing the anatomies of both modern and extinct species, allows scientists to study the skin, hair, and organs of ancient creatures.

Explanation:

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