An element is defined by the number of protons in the nucleus but its properties are largely determined by the number and configuration of electrons around that nucleus. Remember that the definition of an element is entirely made up by and for humans. Physical properties couldn't care less how we categorize them. Roughly speaking the more electrons there are the more possible configurations there are for them so the larger the element (and hence the more electrons) the harder their behavior is to predict. If you look in detail at a periodic table you'll find that the triple-digit elements in particular are missing a lot of physical details because they can only be obtained empirically and they don't stick around long enough to do that. As for names how about Faradanium, Hawkonium, Salkium, Kakunium, Saganium.