A casualty is the damage, destruction, or loss of property resulting from an identifiable event that is sudden, unexpected, or unusual. 1  A sudden event is one that is swift, not gradual or progressive. 2  An unexpected event is one that is ordinarily unanticipated and unintended.
exists and is an alternate of . The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases. The noble gas preceding the element in question is written then the electron configuration is continued from that point onwards. The notation is shorter to write and makes it easier to identify elements.
A: The noble gases are a group of seven elements on the Periodic Table of Elements. Together they make up Group 18 on the table and include (in increasing atomic number) helium, neon, argon, krypton, xenon, radon and element 118, which has been temporarily named ununoctium. All noble gases display similar properties under standard conditions.