Question

Listed below are the locations of certain elements in groups and periods of the periodic table.Arrange these elements in the expected order of increasing non-metallic character:  I. Element in the fourth period and group IV A  II. Element in the third period and group VI A  III. Element in the fourth period and group VI A  IV. Element in the six period and group III A  V. Element in the second period and group VII A  The correct order is:  A. I < II < III < IV < V  B. V < IV < III < II < I  C. IV < I < III < II < V  D. V < IV < II < I < III​

Answer 1

Answer:

"d- block

The element with atomic number 57 belongs to d- block element as the last electron enters the 5d orbital against the Aufbau principle. This anomalous behaviour can be explained on the basis of the greater stability of the xenon (inert gas) core

After barium (Z = 56) , the addition of the next electron (i.e. 57th) should occur in 4 f- orbital in accordance with Aufbau principle this will however, tend to destabilize the xenon core "

Answer 2

Answer: C

Explanation:

I refers to the element Ge
II refers to the element S
III refers to the element Se
IV refers to the element Tl
V refers to the element F

Non-metallic character follows the order: Tl < Ge < Se < S < F
which is: IV < I < III < II < V

therefore, the correct answer is: C