Examlex
One can say with certainty that the pyramidal structure is the tetrahedral arrangement minus a bond but with a lone pair.
Tylenol
A brand name for acetaminophen, a medication used to reduce fever and relieve pain.
Restricted Delivery
A postal service option that ensures a mail or package is only delivered to the specific recipient or their authorized agent.
Certified Mail
A postal service that provides the sender with a mailing receipt and electronic verification that an article was delivered or that a delivery attempt was made.
Return Receipt
A postal service feature that provides the sender with proof of delivery, indicating the date the item was delivered and the recipient's signature.
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