Anything can happen, everyday scientist are finding new electrons, metals, etc.
Over the next 50 years we could see way more metals, gas, etc.Knowing that anything can happen we would probaly see in increace.About 50 years ago our periodic table has less gas, etc on it.Back when the peridoc table was made there where barley any elements on it.There was a process of more elements beig added.You will never know when a new element will be added until they day it is.
