Number of electrons in the outermost energy level refers to ................ number.

The outermost energy level of all noble gases is filled with ................... electrons

all noble gases have their outermost energy level filled completely with 8 electrons except ....................

Elements of the same group have similar ................ properties.

Elements in the same period have ................ number of energy levels.

Atomic size is determined by knowing ....................... of the elements

Atomic radius is measured by a unit of .........................

During a schemical reaction, metal atoms tend to

The lowest element in the metallic property is

The magnesium reacts with the oxygen giving ......

The are metallic oxides, where some of them can dissolve in water and form alkaline solutions

The element that exists in group 3 A and period 3 is ............