DNA
When calculating the mass of an atom, you add the mass of the protons and the neutrons. This is the nucleus of the atom. The electrons are small enough to be ignored except in the most delicate calculations.
If a nucleus contained no neutrons, there would only be protons all with a positive charge which would be very unstable. Neutrons help space out the positive charges and bind the nucleus together.
library
It was very very valuable
The missing word is.... encylopaedia.
Rutherford discovered the atomic nucleus and the proton. A short answer for the Rutherford atomic model: the atom is composed from a central part - a nucleus, positively charged, surrounded by electrons - very small negative charged particles.
neon is valuable, it is also very rare.
in eukaryotic cells it is distributed over several linear chromosomes contained in an organelle called the nucleusin prokaryotic cells most of it is contained in one circular chromosome with small amounts distributed over several circular plasmids (there is no nucleus)in viruses it is contained in one usually linear chromosome (a few very small viruses use RNA instead of the DNA used by all other organisms)In all cases it is called the genome of that organism.
Research has produced a wide range of sites offering information about the NuvaRing which is a method of birth control. There is a large amount of very valuable information on this product on the NuvaRing website.
Magic the Gathering cards dating back to 1993 (Alpha, Beta, and Unlimited) tend to be very valuable. You can get information on individual cards here: http://www.magictraders.com/pricelists/
valuable
i believe so. it had very valuable information the same that some certifications i payed over 1 grand for. i dont know if its nationally recognized but its very informative.