(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:
Correct answer: A. (A) < (B) < (C)
- A. (A) < (B) < (C)
- B. (C) < (B) < (A)
- C. (A) < (C) < (B)
- D. (B) < (A) < (C)
Explanation
In the third period, oxide character changes from ionic to amphoteric to covalent. This corresponds to moving from left to right across the period. Therefore, the atomic numbers must be in increasing order: e.g. (Mg) < (Al) < (Si).
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
The correct decreasing order of electropositive character among the following elements is:
Among the following elements (whose electronic configuration are given below),the one having the highest ionization energy is:
The 7th Period of the Periodic Table is:
K+ ,Cl- ,Ca2+ and S-2 are isoelectronic. The decreasing order of their size is :
The false statement about lithium is:
Eka-aluminium and Eka-silicon are known as: