Representative elements are elements of

First three ionisation energies (in kJ/mol) of three representative elements are given below: {:("Element",IE_(1),IE_(2),IE_(3)),(P,495.8,4582,6910),(Q,737.7,1451,7733),(R,577.5,1817.2745):} then incorrect option is:

Trace elements and tracer elements

Find out total number of representative elements in the given element: Cd, Nb, Ta, Te, Ra, Mo, Po, Pd, Tc

Find out total number of representative elements in the given element: Cd, Nb, Ta, Te, Ra, Mo, Po, Pd, Tc

Assertion: Some essential elements are called structural element of cells Reason: These essential elements are the components of certain biomolecules.

First member of each group of representative elements (i.e., s and p-block elements) shows anomalous behaviour. Illustrate with two examples.

The main group elements i.e. representative elements complete their electron configuration using s and p electrons in the periodic table. These elements range from the most metallic to the most non-metallic with intermediate properties, the semi-metals, in between .The elements which occur at the two extremes of the periodic table are highly reactive and therefore, these highly reactive elements do not occur in free state : they usually occur in the combined forms. Beryllium and aluminium exhibit many properties which are similar, but, the two elements differ in :

Elements are represented by ____

The following table represent the elements and the atomic number: With reference to this, answer the following using only the alphabets given in the table. Which element has an electron affinity zero ?

Name the element with reference to the elements of the modern periodic table. The more non-metallic element from the elements S, P, Cl and Ar.