Mendeleef’s Periodic Table is upset by the fact that

An element 'X' in the third period exhibits a sharp increase in its third ionization enthalpy. Element 'X' forms an amphoteric oxide and reacts with both acids and bases. Identify 'X'.

Elements in the same group of the periodic table have the same:

An element 'X' has the highest third ionization enthalpy in the 3d series. Which of the following is most likely to be 'X'?

Which of the following elements is expected to have the largest atomic radius?

Element 'X' has the following properties: it exhibits variable oxidation states, forms coloured compounds, and its highest oxidation state corresponds to its group number. 'X' is most likely situated in which block of the periodic table?

Elements of group 1 and group VI in the periodic table have one thing common. That is with the increasing atomic number, the:

An element has E.C. $1{S^2}\,\,2{S^2}\,\,2{P^6}\,\,3{S^2}\,\,3{P^3}$ predict their period, group and block

Which block of the periodic table contains elements with their outermost electrons in the p-subshell?

Which of the following properties generally decreases across a period from left to right, but shows an anomalous increase at Group 15 elements compared to Group 14 and 16 elements?

Among the following most metallic element is