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When are atoms lost or created?

Posted: Fri Oct 04, 2019 8:05 am
by Jose Robles 1D
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)

Re: When are atoms lost or created?

Posted: Fri Oct 04, 2019 11:02 am
by Justin Quan 4I
No atoms cannot be created or destroyed, but something’s we leave out intermediate reactants and products to simply the chemical equation.

Re: When are atoms lost or created?

Posted: Fri Oct 04, 2019 11:33 am
by emaad_3H
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.

Re: When are atoms lost or created?

Posted: Fri Oct 04, 2019 12:06 pm
by Caitlin Ciardelli 3E
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

Re: When are atoms lost or created?

Posted: Sat Oct 05, 2019 7:40 pm
by stephaniekim2K
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.

Re: When are atoms lost or created?

Posted: Sat Oct 05, 2019 8:27 pm
by thanh24mai
the law of conservation of mass states that atoms actually cannot be lost or created in a reaction!

Re: When are atoms lost or created?

Posted: Sat Oct 05, 2019 10:20 pm
by jeffreygong1I
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.

Re: When are atoms lost or created?

Posted: Sun Oct 06, 2019 11:19 pm
by Abraham De Luna
The law of conservation of mass states that atoms cannot be created or destroyed.

Re: When are atoms lost or created?

Posted: Mon Oct 07, 2019 11:34 pm
by Ethan Lam 4A
Atoms can only be destroyed in nuclear reactions.

Re: When are atoms lost or created?

Posted: Mon Oct 07, 2019 11:54 pm
by Sreyes_1C
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

Re: When are atoms lost or created?

Posted: Sun Oct 13, 2019 3:10 pm
by Cynthia Rodas 4H
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.

Re: When are atoms lost or created?

Posted: Sun Oct 13, 2019 3:14 pm
by Sadhana_Dicussion_4A
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.

Re: When are atoms lost or created?

Posted: Sun Oct 13, 2019 3:34 pm
by alexfwang3g
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.

Re: When are atoms lost or created?

Posted: Sun Oct 20, 2019 7:05 pm
by Ethan Low 1L
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!

Re: When are atoms lost or created?

Posted: Mon Oct 28, 2019 5:18 pm
by Varadhan_3G
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).