PERIODIC CLASIFICATION OF ELEMENTS

CAREER POINT PERIODIC CLASSIFICATION (HOTS ) Comment on the electropositive and electronegative of elements when we move in a period ? Correct the statement “ Elements in the same period have equal valency” How would the tendency to loose electrons change when we move from right to left in a period ? How do the tendency to gain electrons change when we move up in group 16 ? An element Y is in second period and group 16 . What will be its valency, valence electrons and formula with sodium ? An element forms a covalent compound X 2Y . Suggest the element Y would be with reason ? A metal X is from group 1 . What will be the formula of it oxide and fluoride ? Give an example where Mendeleev inverted the sequence of elements to arrange the elements as per properties ? Name the scientist who showed that ATOMIC NO is the more fundamental property of an element ? Justify that Hydrogen can be kept in group 1 and group 17 also ? Why noble gases were discovered late ? What are Alkaline Earth metal group ? Why is it called so ? What are Alkali Metal group ? Why are they called so ?