i see your point.
so your "liquid" state of a hydrogen atom is the energy level at which the molecules are in a liquid state. thus when they are brought together, ceteris paribus, they should remain as a liquid.
what if though, the original atom of hydrogen is at its "liquid" producing temp.(-256C) or its kinetic energy level that produces a liquid and so are all the introduced atoms added to the original hydrogen atom and that the chamber is a pure vaccum, they should remain a liquid.
this is not the case however. you realise that electrons and protons have an electric field surrounding them, due to the fundamental charges that they possess. it is the interactions of conflicting electric fields that lead to the different properties you observe.
true but they still together at the right kinetic energy level or temp. in hydrogen produce a liquid.
also, the fields are not uniform (electrons move constantly, while protons move minutely). therefore 1+1 is not equal to 2 all the time.
with the conflicting changes in electric and thus, magnetic fields, the compound/molecule takes on different properties.
the electric and magnetic fields of ALL the atom(s) would be, for the most part the same, because they are ALL at the same kinetic energy state.(-256C).
for example, you know that a change in electrical flux will make a change in magnetic flux. a hydrogen atom existing by itself will change its electric field due to the constant motion of its electron. but when u add in 2 more fields (the other hydrogen atom's electron and proton) the electric field will be distorted, will it not? that is why the properties are so different.
true adding an atom to another atom will initally have its affects not only the other(s) but also upon its self. however given the time at the right kinetic energy these inital affects will settle down, so that the molecule built will in time show a liquid property as a whole.
all these are more generally known as intermolecular or intramolecular forces, of course. they do not exist in single atoms, that is why single atoms are different from molecules/compounds/etc.
but i what i was driving at before is this, it maybe possible that one atom has within its self the ability to be a self sufficient atom to to speak, if brought down to the right kinetic energy level and if ALL subseqent atoms were at the SAME kinetic energy level as the first, then all you'd be doing is adding to the molecule until it reached a critical mass, in which, what we call a liquid, shows its self.