QQuestionChemistry
QuestionChemistry
How many valence electrons would be shown in the electron dot diagram of a helium atom?
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Answer
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Step 1:I'll solve this problem step by step, following the specified LaTeX formatting guidelines:
Step 2:: Understand the Helium Atom
Helium is a noble gas located in Group 18 (formerly Group 8A) of the periodic table. To determine the number of valence electrons, we need to look at its electron configuration.
Step 3:: Electron Configuration of Helium
The electron configuration of helium is $$1s^{2}$$, which means it has two electrons in its first (and only) energy level.
Step 4:: Valence Electrons Definition
Valence electrons are the electrons in the outermost shell of an atom that participate in chemical bonding.
Step 5:: Counting Valence Electrons
For helium, all of its electrons are in the first shell, which means both electrons are considered valence electrons.
Step 6:: Electron Dot Diagram Representation
In an electron dot diagram, each valence electron is represented by a dot around the element's symbol.
Final Answer
The electron dot diagram for helium would look like: He: (with two dots placed on opposite sides of the He symbol)
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