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nignag [31]
3 years ago
8

.Most of the atomic energy levels are stable (nonreactive) with how many electrons

Chemistry
1 answer:
kipiarov [429]3 years ago
7 0
Stable if they have a full outer shell. 8 electrons in their outer shell
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Write down your understanding of plate tectonics.
anygoal [31]

Answer:

The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.

Explanation:

5 0
2 years ago
According to collision theory, the rate of reaction depends on atoms colliding in the correct _________ with enough ________ for
kenny6666 [7]

Answer: orientation , energy , frequency

Explanation:

According to the collision theory , the number of collisions that take place per unit volume of the reaction mixture is called collision frequency. The effective collisions are ones which result into the formation of products.

Effective collisions depends on the following  two factors:-

1. Orientation factor: The colliding molecules must have proper orientation at the time of collision to result into formation of products.

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4 0
3 years ago
Write a balanced chemical equation for the reaction that occurs when calcium metal undergoes a combination reaction with O2(g)?
ivann1987 [24]
When calcium joins with calcium its follows the following equation:

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hope that helps 

8 0
3 years ago
Calculate the number of moles of caco3 (calcium carbonate, or limestone) in a 20.0g sample of this substance
Brrunno [24]
First calculate for the molar mass of the given formula unit, CaCO₃. This can be done by adding up the product when the number of atom is multiplied to its individual molar mass as shown below.

     molar mass of CaCO₃ = (1 mol Ca)(40 g Ca/mol Ca) + (1 mol C)(12 g of C/1 mol of C) + (3 mols of O)(16 g O/1 mol O) = 100 g/mol of CaCO₃

Then, divide the given amount of substance by the calculated molar mass.
            number of moles = (20 g)(1 mol of CaCO₃/100 g)
             number of moles = 0.2 moles of CaCO₃

<em>Answer: 0.2 moles</em>
6 0
3 years ago
Can somebody help me plz
xxMikexx [17]

Answer:r=1.2 d=2.4

Explanation:

Radius is half the diameter and the diameter is 2.4 m

8 0
3 years ago
Read 2 more answers
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