Which pair of elements markedly differs from other members of their respective groups?
Correct answer: D. Lithium and Beryllium
- A. Potassium and Calcium
- B. Sodium and Magnesium
- C. Cesium and Barium
- D. Lithium and Beryllium
Explanation
Because of small size and high charge density, the first member of every group differs from the rest of members of same group. In the given options, lithium and beryllium differs from other members of group IA and IIA respectively. Hence, option D is correct.
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 bar chart shows the period of elements from lithium to neon.Which property of these elements is shown on the chart?
Part of the periodic table is shown. The letters are not the symbols of the elements.Which statement is correct?
FIX THIS: Part of periodic table is shown; the letters are not symbol of the elements.Which statement is correct?
The melting point of sulphur is higher than that of phosphorous because:
Who is the element that forms normal oxide only
Element whose salt do not impart colour to flame test is: