The density (gcm-3) at 20oC of alkaline earth metals down the group:
Correct answer: B. First decreases then increases
- A. First increases then decreases
- B. First decreases then increases
- C. Continuously decreases
- D. Continuously increases
Explanation
The correct answer is that the density of alkaline earth metals first decreases and then increases as you move down the group. Initially, the atomic size of the metals increases, which leads to a decrease in density. However, as we move further down the group, the increase in atomic mass becomes the dominant factor over the increase in volume, causing the density to increase. Other options suggesting a continuous trend are incorrect, as they do not account for the initial decrease followed by an increase in density.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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