Questions and Answers
Which is the electronic configuration for oxygen?
In which block of the periodic table is uranium (U) found?
Which is the noble gas notation for chlorine?
It is easier to determine the electron configurations for the p-block elements in periods 1, 2, and 3 because:
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What is the number of valence electrons in cadmium (Cd)?
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Which of these elements has an electron configuration of [Kr]5s2?
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Which is the noble-gas notation for lead (Pb)?
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In which block of the periodic table is chromium (Cr) found?
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Which is the electron configuration for nobelium (No)?
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Arsenic does not have any valence electrons in the 3d orbital because:
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How many valence electrons does lithium (Li) have available for bonding?
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Which of the following elements has the fewest valence electrons?
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The noble-gas notation for tin (Sn) will contain the symbol:
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The electron configuration of nitrogen (N) is:
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Hydrogen reacts with an element to form a compound. Which element would have the most electrons available to react with hydrogen?
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Study Notes
Electron Configuration
- Oxygen's electron configuration is 1s² 2s² 2p⁴.
- Strontium has the electron configuration [Kr]5s².
- Nobelium's electron configuration is represented as [Rn]7s² 5f¹⁴.
- Nitrogen's electron configuration is 1s² 2s² 2p³.
Periodic Table Blocks
- Uranium (U) is found in the f block of the periodic table.
- Chromium (Cr) is located in the d block.
Noble Gas Notation
- Chlorine is denoted by noble gas notation as [Ne] 3s² 3p⁵.
- Lead (Pb) has the noble gas notation [Xe] 6s² 4f¹⁴ 5d¹⁶p².
- Tin (Sn) is represented with noble gas notation containing [Kr].
Valence Electrons
- Cadmium (Cd) has 2 valence electrons.
- Arsenic does not have valence electrons in the 3d orbital because its 3d orbital is completely filled.
- Lithium (Li) has 1 valence electron, making it suitable for bonding.
- Among beryllium, boron, carbon, and lithium, lithium has the fewest valence electrons.
Key Observations on Electron Configurations
- Determining electron configurations for p-block elements in the first three periods is easier due to their electrons being assigned to s and p orbitals only.
- Chlorine reacts with hydrogen as it has the most electrons available for bonding compared to oxygen, neon, and nitrogen.
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Description
Test your knowledge on electron configurations and the arrangement of elements in the periodic table. This quiz covers essential concepts related to electronic configurations, blocks of the periodic table, and noble gas notation. Perfect for students studying chemistry.
