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Annette [7]
3 years ago
10

Which of the following elements is the most reactive A.potassium B.Lithium C. Sodium D. Rubidium

Chemistry
1 answer:
Alika [10]3 years ago
5 0
The awnser is D beacuse the lower in group one you get the more reactive with water
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Compared to our solar system, the universe is
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What occurs as energy is transferred through the convective zone of the Sun? Check all that apply.
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7 0
3 years ago
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State Hund's rule.
loris [4]

Answer:

C. The lowest-energy electron configuration of an atom has the maximum number of unpaired electrons, all of which have the same spin, in degenerate orbitals.

Explanation:

The Hund's rule is used to place the electrons in the orbitals is it states that:

1. Every orbital in a sublevel is singly occupied before any orbital is doubly occupied;

2. All of the electrons in singly occupied orbitals have the same spin.

So, the electrons first seek to fill the orbitals with the same energy (degenerate orbitals) before paring with electrons in a half-filled orbital. Orbitals doubly occupied have greater energy, so the lowest-energy electron configuration of an atom has the maximum number of unpaired electrons, and for the second statement, they have the same spin.

The other alternatives are correct, but they're not observed by the Hund's rule.

6 0
3 years ago
Which object gives off heat?
nadezda [96]

Answer:

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Explanation:

A flashlight gives out heat

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7 0
3 years ago
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2
Anton [14]

Answer:

Weight is the measure of the force of gravity on an object. The mass of an object will never change, but the weight of an item can change based on its location. For example, you may weigh 100 pounds on Earth, but in outer space you would be weightless.

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I can't see the options but I hope this helps!

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