When are atoms lost or created?

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Jose Robles 1D
Posts: 100
Joined: Fri Aug 02, 2019 12:15 am

When are atoms lost or created?

Postby Jose Robles 1D » Fri Oct 04, 2019 8:05 am

I understand that atoms are not destroyed during chemical reactions, but is there a case where atoms are lost or created in a reaction, and if so, is it covered in chem 14A?(To prepare for the future)

Justin Quan 4I
Posts: 104
Joined: Sat Sep 14, 2019 12:17 am

Re: When are atoms lost or created?

Postby Justin Quan 4I » Fri Oct 04, 2019 11:02 am

No atoms cannot be created or destroyed, but something’s we leave out intermediate reactants and products to simply the chemical equation.

emaad_3H
Posts: 51
Joined: Thu Jul 11, 2019 12:17 am

Re: When are atoms lost or created?

Postby emaad_3H » Fri Oct 04, 2019 11:33 am

The law of conservation of mass states that for any closed system, the mass of the system must remain constant. Atoms cannot be created or destroyed in a reaction. The confusion might lie in the fact that different molecules are created. The atoms are just rearranged and form different bonds than they started with. As they interact with different atoms, they form different molecules, which is the reaction itself.

Caitlin Ciardelli 3E
Posts: 44
Joined: Wed Sep 18, 2019 12:19 am

Re: When are atoms lost or created?

Postby Caitlin Ciardelli 3E » Fri Oct 04, 2019 12:06 pm

According to the conservation of mass, no atoms can be created nor destroyed in a closed reaction. This is in fact why we need to always balance equations before solving a problem. We need to ensure that the same number of moles of any atom are conserved between the reactant and product sides of the reaction. What can change, is the arrangement of atoms and their phases

stephaniekim2K
Posts: 79
Joined: Fri Aug 09, 2019 12:16 am

Re: When are atoms lost or created?

Postby stephaniekim2K » Sat Oct 05, 2019 7:40 pm

Atoms cannot be created or destroyed according to the Law of Conservation in chemical reactions, but Professor Lavelle did mention that in the future we will learn about a different type of reaction where atoms can be created of destroyed.

thanh24mai
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: When are atoms lost or created?

Postby thanh24mai » Sat Oct 05, 2019 8:27 pm

the law of conservation of mass states that atoms actually cannot be lost or created in a reaction!

jeffreygong1I
Posts: 49
Joined: Thu Jul 11, 2019 12:15 am

Re: When are atoms lost or created?

Postby jeffreygong1I » Sat Oct 05, 2019 10:20 pm

When an atom splits during a fission reaction, the products are slightly less massive than the original because part of the mass is converted into energy. Also, atoms can be destroyed by reacting with antimatter, and apparently matter can be created by something called pair production, but don't ask me what that is.

Abraham De Luna
Posts: 31
Joined: Sat Sep 14, 2019 12:16 am

Re: When are atoms lost or created?

Postby Abraham De Luna » Sun Oct 06, 2019 11:19 pm

The law of conservation of mass states that atoms cannot be created or destroyed.

Ethan Lam 4A
Posts: 69
Joined: Thu Jul 11, 2019 12:17 am

Re: When are atoms lost or created?

Postby Ethan Lam 4A » Mon Oct 07, 2019 11:34 pm

Atoms can only be destroyed in nuclear reactions.

Sreyes_1C
Posts: 90
Joined: Fri Sep 28, 2018 12:19 am

Re: When are atoms lost or created?

Postby Sreyes_1C » Mon Oct 07, 2019 11:54 pm

Its always good to remember mass is neither created or destroyed. However it can be confusing since he mentioned something about atoms being destroyed in nuclear reactions, but pretty sure we won't see that in this class

Cynthia Rodas 4H
Posts: 51
Joined: Wed Sep 18, 2019 12:21 am

Re: When are atoms lost or created?

Postby Cynthia Rodas 4H » Sun Oct 13, 2019 3:10 pm

The law of conservation of mass states that atoms are neither created or destroyed. Therefore, if a chemical reaction occurs, then the chemical formula will result in the reactants and/or products being multiplied by factors that result in the same number of atoms.

Sadhana_Dicussion_4A
Posts: 51
Joined: Sat Sep 07, 2019 12:19 am

Re: When are atoms lost or created?

Postby Sadhana_Dicussion_4A » Sun Oct 13, 2019 3:14 pm

According to Dalton's atomic theory, atoms of one element cannot be converted into atoms of another element, and atoms can neither be created or destroyed in chemical reactions. The law of conservation of mass also supports this.

alexfwang3g
Posts: 50
Joined: Thu Jul 11, 2019 12:16 am

Re: When are atoms lost or created?

Postby alexfwang3g » Sun Oct 13, 2019 3:34 pm

Atoms cannot be lost or created in the grand scheme of things due to the law of conservation of mass. However, they can be transformed but ultimately, there are the same number of total atoms left in the universe.

Ethan Low 1L
Posts: 24
Joined: Wed Sep 18, 2019 12:15 am

Re: When are atoms lost or created?

Postby Ethan Low 1L » Sun Oct 20, 2019 7:05 pm

According to the law of conservation, atoms cannot be created or destroyed. I guess this is what happens in nature, however I think that with nuclear reactors we can convert atoms into energy. I don't think this will be covered in 14A or in our undergrad chem... cause that seems to be out of the scope of what we would need to know for general chemistry!

Varadhan_3G
Posts: 49
Joined: Wed Sep 18, 2019 12:20 am

Re: When are atoms lost or created?

Postby Varadhan_3G » Mon Oct 28, 2019 5:18 pm

Atoms are not lost or created either:) It is a lot like recycling--there is more information on the conservation of matter on Professor Lavelle's website (I would recommend watching the video of his lecture on this topic).


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