The properties of an element in the periodic table depend on its - a) atomic size b) atomic mass c) electronic configuration d) number of protons

An element with atomic number 64 will have the electronic configuration

Atomic number of few elements are given below 10, 20, 7, 14 (a) Identify the elements (b) Identify the group number of these elements in the periodic table (c) Identify the periods of these elements in the periodic table (d) What would be the electronic configuration for each of these elements (e) Determine the valency of these elements.

The fundamental property on which the modern periodic table is based is atomic number, not atomic mass.

Assertion:In the present form of periodic table,the period number corresponds to the highest principal quantum number of the elements in the period. Reason:Elements having similar outer electronic configuration in their atoms belongs to same period.

The electronic configuration of an element with atomic number 24 is