Since this atom has a total of eight electrons, it also has eight protons. The atom with eight protons in its nucleus (atomic number 8) is oxygen. Each energy level holds a certain number of electrons ...

The modern periodic table is based closely on the ideas he ... tended to combine with two other atoms. For example, one oxygen atom combines with two hydrogen atoms to make water (H₂O).

The modern periodic table is based closely on the ideas he ... tended to combine with two other atoms. For example, one oxygen atom combines with two hydrogen atoms to make water (H₂O).

This exercise uses molecular models to calculate atom economy for a saponification reaction. As part of the ChemClub's 10 th Anniversary, we asked clubs to create elements of the periodic table ...

On the periodic table ... which means there's only one atom. (Mon- means "one.") Helium is a monatomic element. And oxygen can be triatomic, with the oxygen atoms forming a triple bond.

Electronegativity, an essential characteristic of all elements in the periodic table, measures an atom's ability to attract electrons towards ... The electrons in the covalent bond are shared equally ...