I realize this as well. Also, the older books may be better for info about compounds, but the farther back you go, the less elements there were. I have a pamphlet that I got in 1999, with an ancient periodic table in it. Rutherfordium hadn't been named yet, and Tungsten was still called Wolfram. The only accurate part was the atomic weight.
These are minor details. You may safely assume General Chemistry books from the last 30 years to be up to date. Perhaps even form the last 50 years. Sure, some of them can be bad, weak, or unreadable, but the basics have not changed.
And while these older books may not contain some of the new elements it doesn't matter - element that has been observed three times, all eight atoms of it, is - to say the least - esoteric. Sure, it is an interesting area of research, but it doesn't change Chem101. You see - it is like Route 66 sticker on the Plymouth Cuda. Remove the sticker and you still have a muscle car
Oh, and go check this link:http://en.wikipedia.org/wiki/List_of_alkanes
You sure have a lot to learn, including how to efficiently use Google