Addition of 2nd electron to a uni negative ion is always____________________?
Correct answer: B. Endothermic
- A. Exothermic
- B. Endothermic
- C. Data is insufficient
- D. Unpredictable
Explanation
Adding a second electron to a uninegative ion is endothermic because the incoming electron is repelled by the already negative ion, so energy must be supplied. Students may choose a by assuming every electron addition releases energy, but that is mainly true for the first electron added to a neutral atom.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Periodic Properties and Trends questions
Metallic characters of alkali metals_____________________?
Keeping in view the size of atom which order is correct one ?
The element cesium bears resemblance with________________?
Ionization energy depends upon____________________?
The property which increases upto group IV-A then decreases on wards_______________?
Which discovery caused a revision in the periodic law as stated by Mendeleev ?