Question

question 70 (1 point)
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_____is an allotrope, and ______is a semi metal, respectively.

1. lead, silver
2. gold, aluminum
3. iodine, carbon
4. carbon, selenium

Explanation:

To solve this, we analyze each option:

• Option 1: Lead and Silver are metals, not an allotrope - semimetal pair.
• Option 2: Gold and Aluminum are metals, incorrect.
• Option 3: Iodine is a non - metal (not an allotrope in the relevant sense here), Carbon is non - metal (not a semimetal), incorrect.
• Option 4: Carbon has allotropes (e.g., diamond, graphite), Selenium is a semimetal. This matches the requirements.

Answer:

1. Carbon, selenium