Which are the elements in which the last electron enters the d subshell?

The elements in which the last electron enters into the p-orbitals of their outer-most shell are called p-blocks elements:- Name two allotrops of sulphur.

The figure of an incomplete periodic table is given below. Which of these elements have 3 electrons in their outermost p subshell ?

Which element is having last electron in 3p?

The element X in group 17 has 3 shells. If so: What will be the chemical formula of the compound formed if the element X reacts with element Y of the third period which contains one electron in the p subshell?

Which elements contains 5 electrons in the outermost shell?

Which is the element that has 5 p electrons in the outermost shell?

There are 4 shells in the element X. The 3d subshell of X contains 6 electrons. (symbol is not real) a. Write down the complete subshell electronic configuration of X. b. Identify the Group and block. c. Write two characteristics of the elements in which X is included? d From which subshell does this element loses its electrons to show +2 oxidation state?

Pick out the statements which suits to f block elements. a. All of them are naturally occurring elements. b. Uranium and Thorium are f block elements. c. Last electrons is filled in the shell pre-ceding the outermost shell. d. last electrons are filled up in the antepenultimate shell. e. Includes some radioactive elements. f. Some of them are used as catalyst in petroleum industry.

Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.