Recent content by Colin Cheng

Ok got it, thanks

How can we find the change in oxidation number in the reaction? Is it possible?

Hi everyone. I'm a high school student. Recently I have been doing some past papers to prepare for the public exam in April. The reaction "ethene + steam ----> ethanol" is given and I was asked to name the type of reaction. I answered oxidation but the answer is addition. Later I asked my...

Oh I see thanks!Colin

So it also requires a lot energy when they form CH3Br and CH2Br?Colin

But chlorine, bromine, fluorine... They form molecules which are covalent too... I mean like Cl2, Br2...Colin

Why can't chlorine and bromine form a covalent compound?Colin

I'm in year 10 and I have been studying physics and chemistry. When I learned isotopes, I notice that for isotopes, the number of neutron is always higher than that of proton. Is it possible that there are isotopes that the number of neutron is lower than that of proton? If no, is that because...

So you mean radioactivity occurs when the number of neutrons is relatively higher than that of proton?

Sorry I don't get it. When a neutron converts to a proton, why are there both electrons and anti-neutrino emitted?

Thanks for your answers! They are very helpful! Sorry that I asked some non-sense questions.

In the process of particle decay (eg carbon-14 ---> nitrogen-14), is there any relations with radioactivity? Is it reversible? ( up quark + 2 x down quark + W positive boson = down quark + 2 x up quark + electron, so that carbon-14 turns to nitrogen-14. Is it possible that down quark + 2 x up...

There are many other particles having a larger nucleus than carbon-14 but they are stable. Why? Why is carbon-14 radioactive even though its nucleus is relatively small? Is that the strong force applied to carbon-14 is relatively small? If yes, why? Is the size of a nucleus proportional to...