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Questions and Answers
Which elements are included in the s block of the periodic table?
Which elements are included in the s block of the periodic table?
- Hydrogen and Helium (correct)
- Elements in Group 1A and Group 2A (correct)
- Elements in Group 3A to Group 8A
- Transition elements
How many elements are there in each p block period?
How many elements are there in each p block period?
6
How many elements are in the d block?
How many elements are in the d block?
10
What is the electron configuration for silicon (Si)?
What is the electron configuration for silicon (Si)?
What is the electron configuration for chlorine (Cl)?
What is the electron configuration for chlorine (Cl)?
The f block contains inner transition elements, specifically two rows at the bottom of the periodic table, and has a total of _____ elements.
The f block contains inner transition elements, specifically two rows at the bottom of the periodic table, and has a total of _____ elements.
The 4s sublevel fills before the 3d sublevel.
The 4s sublevel fills before the 3d sublevel.
What elements are included in the s block?
What elements are included in the s block?
Which groups of elements are found in the p block?
Which groups of elements are found in the p block?
How many elements are there in each d block?
How many elements are there in each d block?
What is the maximum number of electrons that can be held in the f block?
What is the maximum number of electrons that can be held in the f block?
What is the electron configuration for silicon (Si)?
What is the electron configuration for silicon (Si)?
What is the electron configuration for chlorine (Cl)?
What is the electron configuration for chlorine (Cl)?
What fills before the 3d sublevel during electron configuration?
What fills before the 3d sublevel during electron configuration?
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Study Notes
Periodic Table Blocks
- s Block: Includes hydrogen, helium, and elements from Group 2A (2).
- p Block: Comprises elements in Group 3A (13) to Group 8A (18) with six elements per period due to three p orbitals holding up to six electrons.
d Block and f Block
- d Block: Contains transition elements; 10 elements per block as five d orbitals accommodate 10 electrons.
- f Block: Comprises inner transition elements with two rows at the table's bottom; contains 14 elements as seven f orbitals hold up to 14 electrons.
Electron Configuration Notation
- Negative Values in Subshell Labels: Subshells will use negative values to denote ml, filling negative ml first before positive values for electrons.
- Sublevel Filling Order: The filling order follows n (period) and l (sublevel) values; example configurations illustrate electron filling by period and sublevel.
Sample Electron Configurations
- Silicon (Si, atomic number 14): Configuration is 1s² 2s² 2p⁶ 3s² 3p².
- Chlorine (Cl, atomic number 17): Configuration is 1s² 2s² 2p⁶ 3s² 3p⁵.
Key Filling Principles
- The 4s sublevel fills before the 3d sublevel due to lower energy.
- Similar filling order observed in subsequent periods (e.g., 5s before 4d, 6s before 5d).
Periodic Table Blocks
- s Block: Includes hydrogen, helium, and elements from Group 2A (2).
- p Block: Comprises elements in Group 3A (13) to Group 8A (18) with six elements per period due to three p orbitals holding up to six electrons.
d Block and f Block
- d Block: Contains transition elements; 10 elements per block as five d orbitals accommodate 10 electrons.
- f Block: Comprises inner transition elements with two rows at the table's bottom; contains 14 elements as seven f orbitals hold up to 14 electrons.
Electron Configuration Notation
- Negative Values in Subshell Labels: Subshells will use negative values to denote ml, filling negative ml first before positive values for electrons.
- Sublevel Filling Order: The filling order follows n (period) and l (sublevel) values; example configurations illustrate electron filling by period and sublevel.
Sample Electron Configurations
- Silicon (Si, atomic number 14): Configuration is 1s² 2s² 2p⁶ 3s² 3p².
- Chlorine (Cl, atomic number 17): Configuration is 1s² 2s² 2p⁶ 3s² 3p⁵.
Key Filling Principles
- The 4s sublevel fills before the 3d sublevel due to lower energy.
- Similar filling order observed in subsequent periods (e.g., 5s before 4d, 6s before 5d).
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