I dont know the answer but i have some explanation for that question.
Since krypton is in the far right row of the periodic table, its outermost shell is full with eight electrons. This is one of the happy elements and has an electron configuration of 2-8-18-8.
A chemical reaction is described by achemical equation, an expression that gives the identities and quantities of the substances involved in a reaction. A chemical equation shows the starting compound(s)—the reactants—on the left and the final compound(s)—the products—on the right, separated by an arrow.
<span>Results, and conclusion also.
when a chemical change has happened the colour is changed place, so that should definitely be mentioned in the results area.
Colour always changed when it shows a chemical reaction.
Lab should use the change of color to support the conclusion </span>
The electron configuration for Oxygen would be 1s2 2s2 2p4
A = 1
B =2
C =4.
Here are the values.