MCQ
In the modern periodic table, elements are arranged in
- AIncreasing mass
- BIncreasing volume
- ✓Increasing atomic number
- DAlphabetically
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$A : 1s^2\, 2s^2\, 2p^6$
$B : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^3$
$C : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^5$
Given : $K _{ a }\left( CH _{3} CH _{2} COOH \right)=1.3 \times 10^{-5}$