Multiple Choice
Which of the following is an example of an elemental molecule?
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2. Atoms & Elements
Periodic Table: Elemental Forms
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Which of the following is a homonuclear polyatomic element?
A
Chlorine
B
Oxygen
C
Hydrogen
D
Iron
E
Selenium
Verified step by step guidance1
Understand the term 'homonuclear polyatomic element': A homonuclear polyatomic element is composed of molecules that consist of more than one atom of the same element bonded together.
Identify the elements listed: Chlorine (Cl), Oxygen (O), Hydrogen (H), Iron (Fe), and Selenium (Se).
Recall common forms of these elements: Chlorine typically forms diatomic molecules (Cl₂), Oxygen forms diatomic molecules (O₂), Hydrogen forms diatomic molecules (H₂), Iron is usually found as a single atom in its metallic form, and Selenium can form polyatomic molecules such as Se₈.
Determine which element forms a polyatomic molecule: Among the options, Selenium is known to form a homonuclear polyatomic molecule, specifically Se₈, which consists of eight selenium atoms bonded together.
Conclude that Selenium is the homonuclear polyatomic element from the given options.
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