Multiple Choice
Which of the following elements does not exist as a diatomic molecule in its elemental form?
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2. Atoms & Elements
Periodic Table: Elemental Forms
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Which of the following elements is least likely to react with other elements under standard conditions?
A
Oxygen
B
Neon
C
Chlorine
D
Sodium
Verified step by step guidance1
Step 1: Understand the concept of chemical reactivity, which refers to how readily an element reacts with other substances to form compounds.
Step 2: Recall that elements in the noble gas group (Group 18) have a full valence electron shell, making them very stable and generally unreactive under standard conditions.
Step 3: Identify the elements given: Oxygen (a reactive nonmetal), Chlorine (a reactive halogen), Sodium (a highly reactive metal), and Neon (a noble gas).
Step 4: Compare their positions in the periodic table and their typical chemical behavior, noting that Neon, as a noble gas, has a complete octet and is least likely to react.
Step 5: Conclude that Neon is the least likely to react with other elements under standard conditions due to its stable electron configuration.
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