June 2023 Regents Chemistry Exam
40 Which particle diagram represents a sample of xenon at STP?
Solution: Xenon is not a diatomic element, eliminating choices 3 and 4. It is in group 18 which is a Noble Gases group and would therefore be a gas. Gases are spread out and take the shape of the container.
PS: To memorize diatomic elements, we can use the mnemonic BrINCl HOF
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