Everyone at that time imagined the atom as a "plum pudding ... emitted by the radioactive element radium) at a sheet of gold foil only 1/3000 of an inch thick, and tracing the particles' paths.

Particle diagrams can be used to show the ... Water has a specific ratio of two hydrogen atoms to one oxygen atom. Compounds made from non-metal elements that are bonded together usually form ...

Electronegativity, an essential characteristic of all elements in the periodic table ... video on electronegativity, atomic structure and properties. Electronegativity is defined as the tendency of an ...