Name one element ,one compound and one mixture .

Name any one element of each group.

Transition elements are d - block elements and inner transition elements are f-block elements. Name a transition metal compound and write one use of it.

Name any one elemental semiconductor.

Statement I : All compounds contain more than one element. Statement II : All compounds are heterogeneous mixtures.

Name the element whose atom contains only one proton and one electrons.

Name one anti aromatic Compound.

Name one element invariable found proteins but not in carbohydrates and fats.

Name one element invariably found in proteins but not in all carbohydrates and lipids.

(a) What are ionic compounds and covalent compounds? Give the name and formula of one ionic compound and one covalent compound. (b) Write the major points of difference between ionic compounds and covalent compounds.