QQuestionChemistry
QuestionChemistry
Locate the element helium (He) on the periodic table.
What is the period number in which helium is found?
What is the group name in which helium is found?
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Answer
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Step 1:I'll solve this problem step by step, following the specified LaTeX and formatting guidelines:
Step 2:: Locate Helium on the Periodic Table
- Helium ($$\mathrm{He}$$) is located in the top right corner of the periodic table
- Its atomic number is 2 - It is the second lightest element after hydrogen
Step 3:: Determine the Period Number
- Helium is found in Period 1 - Period number represents the number of electron shells an atom has - For helium, this means it has only one complete electron shell
Step 4:: Determine the Group Number and Name
- Helium is located in Group 18, also known as the Noble Gas group - Noble gases are characterized by: * Full outer electron shell * Extremely low reactivity * Stable electron configuration
Final Answer
- Period Number: 1 - Group Name: Noble Gases (Group 18)
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