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2. Wheelchair ramp - Wikipedia

   en.wikipedia.org/wiki/Wheelchair_ramp

   A concrete wheelchair ramp A portable wheelchair ramp. A wheelchair ramp is an inclined plane installed in addition to or instead of stairs.Ramps permit wheelchair users, as well as people pushing strollers, carts, or other wheeled objects, to more easily access a building, or navigate between areas of different height.

3. Isotopes of argon - Wikipedia

   en.wikipedia.org/wiki/Isotopes_of_argon

   Argon (18 Ar) has 26 known isotopes, from 29 Ar to 54 Ar, of which three are stable (36 Ar, 38 Ar, and 40 Ar). On the Earth, 40 Ar makes up 99.6% of natural argon. The longest-lived radioactive isotopes are 39 Ar with a half-life of 268 years, 42 Ar with a half-life of 32.9 years, and 37 Ar with a half-life of 35.04 days.

4. Noble gas compound - Wikipedia

   en.wikipedia.org/wiki/Noble_gas_compound

   Solid argon-hydrogen clathrate (Ar(H 2) 2) has the same crystal structure as the MgZn 2 Laves phase. It forms at pressures between 4.3 and 220 GPa, though Raman measurements suggest that the H 2 molecules in Ar(H 2) 2 dissociate above 175 GPa. A similar Kr(H 2) 4 solid forms at pressures above 5 GPa. It has a face-centered cubic structure where ...

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. BuilderComs is one Marine’s simple but effective construction ...

   www.aol.com/lifestyle/buildercoms-is-one-marines...

   “When life's on the line or you're trying to fix a house, you need a solution that would get the job done that's simple enough to put out there,” Nussbaum said.

7. Argon - Wikipedia

   en.wikipedia.org/wiki/Argon

   Ar is the reason the standard atomic weight of terrestrial argon is greater than that of the next element, potassium, a fact that was puzzling when argon was discovered. Mendeleev positioned the elements on his periodic table in order of atomic weight, but the inertness of argon suggested a placement before the reactive alkali metal .