All of the noble gas elements except neon have 8 electrons in their outermost energy level. True or false

Answers

Answer 1

Answer:

To solve this we must be knowing each and every concept related to element. Therefore, "all of the noble gas elements except neon have 8 electrons in their outermost energy level" is a false element.

What is element?

A chemical element represents a material that cannot be degraded chemically. Although chemical processes do not modify atoms, nuclear reactions can produce new elements.

Elements are classified according to the amount of protons they have. An element's atoms typically have the same amount of protons, but differing amounts of electrons or neutrons.

There are 118 recognized elements. Element 120.1 is being researched. When element 120 is created and validated, the periodic table must be updated to include it. A numerical subscript following an element in a chemical formula mean number of atoms. All of the noble gas elements except have 8 electrons in their outermost energy level.

Therefore, "all of the noble gas elements except neon have 8 electrons in their outermost energy level" is a false element.

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Answer 2

Answer: False I think neon also has 8 electrons on it's outermost shell, I'm not rlly sure about that answer though.

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The equation is as follow:
2H2 + O2 ⇒⇒ 2H2O

Why for thousand of years people believed that stars moved across earth sky

Answers

Because the earth rotates. and the stars and constellations are in their exact same spots in the universe. its the same as the sun. some people can argue that the sun moves east to west, but in reality, its because the earth is rotating. :)

btw, this is more like an earth science question, not chemistry.

Because they did not have the proper technology. Hope my answer was useful.

Paintball is a popular recreational activity that uses a metal tank of compressed carbon dioxide or nitrogen to launch small capsules of paint. A typical tank has a volume of 508 cubic centimeters. A 340. gram sample of carbon dioxide is added to the tank before it is used for paintball. At 20.oC, this tank contains both CO2(g) and CO2(l). After a paintball game, the tank contains only CO2(g).Determine the total number of moles of CO2 added to the tank before it is used for paintball.

Answers

The total number of moles of CO₂ added to the tank before it is used for paintball is 7.73 moles.

What is a mole ?

A mole of a substance is that containing 6.022 * 10^23 molecules of that substance

A 340 gm sample of carbon dioxide

Molecular weight = 44

Moles added to the tank = mass/ molecular meight

Moles added to the tank = 340 /44

= 7.73 moles

The total number of moles of CO₂ added to the tank before it is used for paintball is 7.73 moles.

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We know,
1000 cm³ = 1 L
1 cm³ = 1 / 1000 L
508 cm³ = (1 / 1000) * 508 L = 0.5080 L

So, 508 cm³ = 0.5080 L

Now,
We know,
22.4 L = 1 mole
1 L = 1 / 22.4 mole
0.5080 L = (1 / 22.4) * 0.5080L = 0.0227 moles

So, 0.0277 moles moles of $CO_2$ are added to the tank before it is used for paintball.

What form of energy provides power for a gas stove?A.nuclear energy
B.electrical energy
C.chemical energy
D.sound energy

Can you explain the answer for me ?

Answers

C . chemical energy will be the answer. In a gas stove, LPG is stored and it is brought out and it reacts with oxygen to give out heat energy. all the other options are not convincing and hence chemical energy is the best answer.

What is the ph of a solution with [H+]=3.3x10

Answers

pH=-log[H⁺]

That means that the pH=-log(3.3×10)=-1.52

I hope this helps. Let me know if anything is unclear.

The chemical reaction in which compounds break up into simpler Constituents is a.

Answers

decomposition its the answer

Answer:

decomposition

Explanation:

did the test and got it correct

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