Name two elements which are detected by Lassaigen's test.

Name two non metals which are brittle solids.

Name the elements which have the smallest and the largest atoms.

Name the phloem elements .

Name the element which is most electronegative , and the element which is least electronegative in the periodic chart.

Study the following table in which positions of six elements A, B, C, D, E and F are shown as they are in the modern periodic table : On the basis of the above table, answer the following questions : (i) Name the element which forms only covalent compounds. (ii) Name the element which is a metal with valency three. (iii) Name the element which is a non-metal with valency three. (iv) Out of D and E, which is bigger is size and why ? (v) Write the common name for the family to which the elements C and F belong.

In the following table, the positions of six elements A, B, C, D, E and F are given as they are in the Modern Periodic Table : On the basis of the above table, answer the following questions : (i) Name the element which forms only covalent compounds. (ii) Name the element which is a metal with valency three. (iii) Name the element which is a non-metal with valency three. (iv) Out of B and C, whose atomic radius is bigger and why? (v) Write the common name for the family to which the elements D and F belong.

Name the element which has highest electron affinity or electron gain enthalpy.

Why do transition elements from complex compounds? Name the elements which exhibit highest oxidation state.