Which Greek philosopher proposed that all matter is made up of very small particles called atoms?

Who discovered the electron by experimenting with a Crookes, or cathode ray, tube?

Who proposed an atomic model that shows electrons move in concentric orbits around the nucleus?

What is the type of bond formed by the complete transfer of valence electron(s) between atoms?

What is the type of covalent bonding that occurs between atoms of metals, in which the valence electrons are free to move through the lattice?

What is the type of covalent bonding that specifically occurs between atoms of slightly different electronegativities sharing electrons?

What is the special kind of dipole-dipole interaction that occurs specifically between a hydrogen atom bonded to either an oxygen, nitrogen, or fluorine atom?

What is the type of force that occurs when the partially positively charged part of a molecule interacts with the partially negatively charged part of the neighboring molecule?

Who discovered the nucleus of the atom in 1911?

What is the type of bond between atoms whose difference in electronegativities is less than 0.5?

What is the type of bond between atoms whose difference in electronegativity is 0.5 - 1.9?

What is the type of bond between atoms whose difference in electronegativity is more than 2.0?

What is the type of force that is the weakest of the intermolecular forces?

What is the type of force that is the attraction between two or more molecules?