Which One of the Following Is Not Isoelectronic with Kr

question 60

Multiple Choice

Which one of the following is not isoelectronic with Kr

• A) As³⁺
• B) Se^2-
• C) Rb⁺
• D) Sr²⁺
• E) Br^-

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Definitions:

Oxidation Number

An indicator of how much an atom in a substance has been oxidized, shown by the quantity of electrons it has either gained or lost.

Reaction

A reaction involves the transformation of one or more substances into different substances through the breaking and forming of chemical bonds.

Exothermic

An exothermic reaction is a chemical reaction that releases heat and energy to its surroundings.

Activation Energy

Activation energy is the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.