Multiple Choice
Which of the following is NOT a diatomic element in its standard elemental form?
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2. Atoms & Elements
Periodic Table: Elemental Forms
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Which of the following elements does NOT exist as a diatomic molecule in its standard elemental form?
A
Nitrogen (N_2)
B
Helium (He)
C
Chlorine (Cl_2)
D
Oxygen (O_2)
Verified step by step guidance1
Understand that diatomic molecules are molecules composed of two atoms of the same element bonded together. Common diatomic molecules in their elemental form include N_2, O_2, and Cl_2.
Recall that nitrogen (N_2) naturally exists as a diatomic molecule because two nitrogen atoms share a strong triple bond, making N_2 very stable.
Recognize that oxygen (O_2) exists as a diatomic molecule with a double bond between the two oxygen atoms, which is its stable elemental form.
Know that chlorine (Cl_2) also exists as a diatomic molecule, where two chlorine atoms share a single bond, forming Cl_2 in its elemental state.
Identify that helium (He) is a noble gas with a complete outer electron shell, so it exists as a monatomic gas rather than forming diatomic molecules like N_2, O_2, or Cl_2.
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