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Match the elements in Column I with their correct electron distribution in Column II according to the BohrтАУBury rules:
| Column I (Element) | Column II (Electron Distribution) |
|---|---|
| A. Sodium (Na) | 1. 2, 8, 2 |
| B. Magnesium (Mg) | 2. 2, 8, 1 |
| C. Aluminium (Al) | 3. 2, 8, 3 |
Choose the correct answer from the options given below:
Sodium (Na) 2, 8, 1
Magnesium (Mg) 2, 8, 2
Aluminium (Al) 2, 8, 3
Calcium (Ca) 2, 8, 8, 2
Sodium (Na) 2, 8, 1
The BohrтАУBury rule dictates the electronic configuration of elements by distributing electrons into shells defined by the maximum capacity formula 2n2. The correct matching based on atomic numbers (Na: 11, Mg: 12, Al: 13, Ca: 20) is: Sodium (2, 8, 1), Magnesium (2, 8, 2), Aluminium (2, 8, 3), and Calcium (2, 8, 8, 2).
The BohrтАУBury rule dictates the electronic configuration of elements by distributing electrons into shells defined by the maximum capacity formula 2n2. The correct matching based on atomic numbers (Na: 11, Mg: 12, Al: 13, Ca: 20) is: Sodium (2, 8, 1), Magnesium (2, 8, 2), Aluminium (2, 8, 3), and Calcium (2, 8, 8, 2).
Think of electronic shells like seats in a movie theater rows: you must fill the front rows completely before moving to the next row, where row 1 holds 2 people, row 2 holds 8, and so on.
KLMN shells (Keep Loving My Notes) to remember the sequence of electron shells.
2n2 тАФ Maximum number of electrons in the nth shell, where n is the shell number.
The distribution follows the Aufbau principle and the capacity of shells (K=2,L=8,M=18,N=32). Electrons fill lower energy levels first; for example, in Calcium (Z=20), electrons fill the K, L, and M shells before placing the remaining two in the N shell, resulting in 2,8,8,2.
The maximum number of electrons in the outermost shell is 8.
Electrons are not accommodated in a given shell unless the inner shells are filled.
Atomic number equals the number of protons/electrons in a neutral atom.
Predicts chemical reactivity and valency of elements.
Does not account for subshells (s,p,d,f) and orbital energy overlaps.
Predicting periodic table group and period.
Determining ionic and covalent bonding potential.
Sodium (Z=11) configuration is 2,8,1.
The provided question text appears to contain a mismatch in the provided 'Official Answer' logic versus standard science; strictly scientifically, Na is 2,8,1 and Mg is 2,8,2.
The official answer key mapping provided in the prompt contains a discrepancy; standard science dictates Sodium is 2, 8, 1 and Magnesium is 2, 8, 2.
Always verify the atomic number (Z) first; the number of electrons equals Z for all neutral atoms.
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