The atomic number of the elements X and Y are 20, 26 respectively. When these ele-ments combines with chlorine, three com-pounds `XCI_2,YCI_2,YCI_3`areformed: Explain the reasonfor this,on the basis of the subshellbased electronic configu- ration.

The atomic number of the elements X and Y are 20, 26 respectively. When these ele-ments combines with chlorine, three com-pounds XCI_2,YCI_2,YCI_3 areformed: What is the speciality of the oxidation number of Y,compared to thatof X?

Iron is a transition element. Iron combines with chlorine to form the compounds FeCl_2 and FeCl_3 . (Hint : Oxidation state of chlorine Cl = -1 , Atomic number of Fe = 26) a) Write down the oxidation states of Fe in FeCl_2 and FeCl_3 . b) Write the subshell electronic configuration of both of the irons in FeCl_2 and FeCl_3 . c) Give reasons for the different oxidation states of Fe.

The outermost electronic configuration of the element A is 2s^2 2p^2 . (Symbolis not real) c. Writ: Write the chemical formula of the com-pound formed by A when it combines with chlorine.

Two elements X and Y combines to form two compounds XY_(2)andX_(3)Y_(2) 0.1 mol of XY_(2) weighs 10 g and 0.05 mol of X_(3)Y_(2) weighs 9g, the atomic weights of X and Y are respectively

There are three elements A, B, C. Their atomic number are Z_(1),Z_(2)andZ_(3) respectively. If Z_(1)-Z_(2)=2and(Z_(1)+Z_(2))/2=Z_(3)-2 and the electronic configuration of element A is [Ar]3d^(6)4s^(2) then the correct order of magnetic moment of

When the teacher asked to write the electronic configuration and box diagram of two elements with atomic number 24 and 29 respectively a student wrote the answer as follows. Z = 24, 1s^2 2s^2 2p^6 3s^2 Sp^6 3d^6 Z = 29, 1s^2 2s^2 2p^6 3s^2 Sp^6 3d^6 4s^2 If there is any mistake in the answer, correct it.