'x_(2)' gives deep blue colour with starch solution. 'x_(2)' is present in periodic table with group number "Y(IUPAC) and period number "Z" Then find value of value of Y and Z

Period number of Sc = x Modern periodic table group number of TI = x (according to 1 to 18 convention) Find the value of y-x

If X:Y=3:4,Y:Z=5:2 then find the value of X:Y:Z.

An element has atomic number 29. it belongs to x period any y group. Given value of 2x +y :

the degree measure of three angles if a triangle are x,y and z If z=(x+y)/2 then find the value of z

Three elements 'X', 'Y' and 'Z' have atomic numbers 7, 8 and 9 respectively. (a) State their positions (Group number and period number both) in the Modern Periodic Table. (b) Arrange these elements in the decreasing order of their atomic radii. (c) Write the formula of the compound formed when 'X' combines with 'Z'.

If x = 1, y = 2 and z = 5 , find the value of 3x – 2y + z .

Three elements X, Y and Z belong to 17th group but to 2nd, 3rd and 4th period respectively. Number of valence electrons in Y is 7. Find the number of valence electrons in X and Z.

A metal salt evolves the dark violet fumes of (X) with MnO_(2) and this (X) gives the deep blue colouration with starch solution. Then number of lone pair on central atom in (X).