When two hydrogen atoms get close enough, the electron from each atom feels an attraction from the proton in the other atom's nucleus. This attraction pulls the atoms together. The electrons end up ...

For example hydrogen has the atomic number of one, helium two, lithium three etc. The first energy ... sodium has the electron arrangement 2,8,1. An atom of sodium has 11 electrons.

Electronegativity, an essential characteristic of all elements in the periodic table, measures an atom's ability to attract electrons towards itself within a chemical bond. This vital theoretical ...

The properties of compounds are linked to the type of bonds formed within them ... If the compound contains three elements one of which is oxygen then the compound name will end in –ate or ...

one to each chlorine atom. Calcium becomes a +2 ion and each chlorine becomes a -1 ion. The +2 calcium ion and the two -1 chloride ions attract each other and form an ionic bond and the compound ...