The answer is soil hope it helps :)
Some common elements that are gaseous state at room temperature are:
Oxygen
Nitorgen
Fluorine
Chlorine
Hydrogen
Helium
In addition, all of the elements in group VIII are gases too, they have an octet of electrons (complete outer electron shell) , they're really stable and therefore they're called noble gases. Some examples from group VIII include helium, krypton, xenon etc.
Substance exist as gases in room temperature is due to their boiling point, where is it lower than the room temperature (usually around 25°C). If their boiling point is higher than room temperature, they should exist as either solid or liquid, which is how the majority of the elements in the periodic table is.
B. The new cells would have an incorrect number of chromosomes.
chemistry of the nitrogenous bases are really the key to function the DNA<span>. something called complementary base pairing. cytosine can forms three hydrogen </span>bonds<span> with guanine, and </span>adenine<span> can form two hydrogen </span>bonds<span> with thymine.</span>