One side of an equilateral triangle is 24 cm The midpoints of its sides are joined to form another triangle whose midpoints are in turn joined to form still another triangle this process continues indefinitely The sum of the perimeters of all the triangles

The ground state electronic configurations of the elements, U, V, W, X, and Y (these symbols do not have any chemical significance) are as follows

U: 

V:

W:

X:

Y:

Determine which sequence of elements satisfy the following statements:

i) Element forms a carbonate which is not decomposed by heating

ii) Element is most likely to form coloured ionic compounds

iii) Element has largest atomic radius

iv) Element forms only acidic oxide