The most electronegative element of the third period is
Correct answer: D. Cl
- A. F
- B. P
- C. Br
- D. Cl
Explanation
The correct answer is Cl. Chlorine, located in the third period and group 17 of the periodic table, is the most electronegative element in that period. Electronegativity increases across a period from left to right due to increasing nuclear charge, which attracts the bonding pair of electrons more strongly. Fluorine, while being the most electronegative element overall, is found in the second period. Phosphorus, being further left in the periodic table, has a lower electronegativity than chlorine. Bromine is not in the third period; it is in the fourth, making it an incorrect choice.
Last updated
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.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2. Law of octaves was proposed by
7th period of the periodic table contains normal elements:
(A), (B) and (C) are elements in the third period. The oxide of(A) is ionic, that of (B) is amphoteric and that of (C) is a giant molecule (covalent network). (A), (B) and (C) have atomic numbers in the order:
(A), (B) and (C) are elements in the third short period. Oxide of (A) is ionic, that of (B) is amphoteric and of (C) a giant molecule. (A), (B) and (C) have atomic numbers in the order of:
A gas that reacts with CaO and not with NaHCO3 is: