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That would result in an enormous outward pressure that would squash everything while heating it to extreme temperatures, resulting in near light speed expansion, and hurl almost all of the earth into space at extreme velocity. Instantly killing all life.

I like to pretend OP is God who is both very bored and still too lazy to do his own research before flipping a catastrophic switch, so he is outsourcing this research to humans.

Oh jeez, like a bunch of stuff, I bet.

Please do not adjust the scale in the devcommands. I’m not saying I’m having a great time here, but this is where I’m having a time.

It’s difficult to say, because all the atoms suddenly doing that would mean that some basic laws of physics had changed, and since it isn’t specified exactly how they’ve changed to produce this strange result it’s hard to predict what might happen next.

But it seems a reasonably safe assumption that there would be a large explosion and then no more Earth.

Pretty sure you need to touch the fine structure constant to do so. And believe me, touching fundamental constant has a lot of side effects, for example semi conductors properties would change

We all die

The one in every 10 atoms, even randomly distributed, would kill all active enzymes in an organism, I would hypothesize. And break chromosomes and RNAs into small pieces. No more enzymes could be produced and therefore the nucleic acid couldn’t be repaired.

I don’t know if it would be enough to lyse cells immediately.

I think the most important part of either question is that everyone would die.

Are we talking about electron distance from nucleus doubling, or protons, neutrons and electrons doubling in size too?

According to Internet, a big mess… (I asked Copilot…)

If atoms were to double in size, it would have profound consequences on the physical world as we know it. The size of an atom is determined by the space its electrons occupy around the nucleus. Doubling the size of atoms would mean that the electrons are further away from the nucleus, which would weaken the electromagnetic forces that hold atoms together.**

Here are some potential effects:

Chemical Bonding: The formation of chemical bonds could be significantly affected. Atoms might not be able to form multiple bonds, such as double or triple bonds, because the overlap of p orbitals would be less likely as they get farther apart.

Material Properties: The properties of materials would change drastically. For instance, metals might lose their conductivity because the delocalized electrons that allow for the flow of electricity would be too spread out. Biological Structures: The structures of proteins and DNA would be altered, potentially disrupting all biological processes. Enzymes might not function properly, and the basic mechanisms of life could fail. Physical Laws: The fundamental constants and laws that govern physical interactions would need to be redefined to accommodate the new atomic sizes. It’s important to note that this is a hypothetical scenario and not currently possible according to our understanding of physics. The size of atoms is a fundamental aspect of quantum mechanics and chemistry, and any change in atomic size would mean a change in the fundamental laws of nature.

Mercury would be solid at room temperature