1. Monatomic = “mono” + “atomic”” “mono” = one
QUESTION:
Which of these naturally occurs as a monatomic gas under ordinary conditions? A. helium, B. sodium, C. oxygen, D. nitrogen
Monatomic = “mono” + “atomic””
“mono” = one
Monatomic gas: atoms are not bonded to other atoms.
Noble gases : He – helium, Ne – neon, Ar – argon Kr – krypton, Xe – xenon, Rn - radon
SCRIPT:
Which of these naturally occurs as a monatomic gas under ordinary conditions? A. helium, B. sodium, C. oxygen, D. nitrogen
PAUSE
The term monatomic comes form the greek prefix mono and atomic.
CLICK
Mono means one.
A monatomic gas is just a collection of individual atoms,… atoms that are not attached to other atoms.
CLICK The family of elements that fit this description is known as the noble gases.
CLICK Members of this family include helium, neon, argon, krypton, xenon, and radon.
CLICK Therefore, the correct answer is A. Among the choices given, only helium is a noble gas.
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2. You will find the noble gases in rightmost colum of the periodic table --- column 18.
This family or group of elements is often referred to as as group 8A, or group zero.
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3. You will find the noble gases in column 18 of the periodic table.
This family or group of elements is often referred to as as group 8A, or group zero.
Here’s helium…
CLICK
neon…
argon…
Krypton
CLICK Xenon
And Radon
PAUSE
END RECORDING

4. Video ID: © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Narrator: Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08