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Periodic Table And Electron Configuration

Kerala Board · Class 10 · Chemistry

Flashcards for Periodic Table And Electron Configuration — Kerala Board Class 10 Chemistry. Quick Q&A cards covering key concepts, definitions, and formulas.

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22 Flashcards
Card 1Quantum Mechanical Model

What are orbitals and how do they differ from Bohr's orbits?

Answer

Orbitals are regions around the nucleus where there is maximum probability of finding electrons, based on quantum mechanical model. Unlike Bohr's definite circular paths (orbits), orbitals represent p

Card 2Quantum Numbers

Define the principal quantum number (n) and list its possible values.

Answer

Principal quantum number (n) represents the shells or principal energy levels of electrons. Possible values: n = 1, 2, 3, 4... where n = 1 is K shell, n = 2 is L shell, n = 3 is M shell, and n = 4 is

Card 3Quantum Numbers

What is azimuthal quantum number (l) and how does it relate to subshells?

Answer

Azimuthal quantum number (l) defines the three-dimensional shape of orbitals and represents subshells. Values range from 0 to (n-1). l = 0 (s subshell), l = 1 (p subshell), l = 2 (d subshell), l = 3 (

Card 4Subshells and Orbitals

How many orbitals are present in s, p, d, and f subshells?

Answer

s subshell: 1 orbital (spherical shape) p subshell: 3 orbitals (dumbbell shape) d subshell: 5 orbitals (complex shapes) f subshell: 7 orbitals (more complex shapes) General formula: For l value, numbe

Card 5Electron Capacity

What is the maximum number of electrons that can be accommodated in each shell?

Answer

Formula: Maximum electrons in shell = 2n² K shell (n=1): 2 electrons L shell (n=2): 8 electrons M shell (n=3): 18 electrons N shell (n=4): 32 electrons Each orbital can hold maximum 2 electrons.

Card 6Electron Capacity

What is the maximum electron capacity of s, p, d, and f subshells?

Answer

s subshell: 2 electrons (1 orbital × 2) p subshell: 6 electrons (3 orbitals × 2) d subshell: 10 electrons (5 orbitals × 2) f subshell: 14 electrons (7 orbitals × 2) General formula: 2(2l + 1) electron

Card 7Electron Configuration

How do you determine the order of energy of subshells using (n+l) rule?

Answer

Energy of subshells increases with increasing (n+l) values. If (n+l) values are equal, subshell with higher n value has more energy. Example: 2p (n+l = 3) < 3s (n+l = 3, but higher n) < 3p (n+l = 4) O

Card 8Electron Configuration

Write the subshell electron configuration of Carbon (₆C) and Neon (₁₀Ne).

Answer

Carbon (₆C): 1s² 2s² 2p² Neon (₁₀Ne): 1s² 2s² 2p⁶ Electrons fill in order of increasing energy: 1s fills first (2 electrons), then 2s (2 electrons), then 2p starts filling.

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