Li + e- ===> Li+
it looses its valence electron to form a uni-positive ion
Elements<span>simplest form of matter that can exist under normal laaboratory conditions</span>
D: After they emit light, electrons are sucked into the nucleus of the atom.
<u>Answer: </u>The correct answer is Option b.
<u>Explanation:</u>
Oxidizing agent is defined as the chemical reagent which helps the other chemical compound to get oxidized and itself gets reduced. The oxidation state for these species gets reduced because they are undergoing reduction reaction.
For the given chemical equation:

Oxidation state of Chromium is getting reduced from +6 to +3 and oxidation state of chlorine getting increased from -1 to 0.
Hence,
acts like and oxidizing agent because it is itself getting reduced to 
Therefore, the correct answer is Option b.
Oxidation of D -Ribose in presence of hypobromous acid gives D-Ribonic acid