Potassium
There is only one metal which is liquid at room temperature and that is Mercury (symbol Hg).
As 'pt' it is neither an element nor a compound. If you mean 'Pt' ( Platinum) , then it is an elementasl metal , found in the Periodic Table. NB For elemental symbols , a one letter symbol is ALWAYS a CAPITAL letter. For a two letter symbol , the first letter is always a CAPITAL letter and the second letter is small/lower case. This is the recognosed international standard. Hence 'pt' does not exist , but 'Pt' is platinum.
Group ONE - this group is called the Alkali metal group
The heaviest element with a one letter atomic symbol is uranium (symbol: U).
Bromine is an element, one of the halogens. Its chemical symbol is Br.
Potassium is a reactive metal, an alkali metal, placed in the group 1 of the periodic table, is soft, has a natural radioactive isotope, easily react with water and halogens, etc. The symbol is K.
Oh, dude, that's like a brain teaser or something. So, like, the element that fits that description is copper (Cu). Its symbol starts with a different letter from the first one in its name. So, yeah, copper is the odd one out in that group.
Group 1 will be more reactive than group 13 elements
a letter or symbol that stands for one or more numbers is a
Salts as a group do but other compounds do not.
The group of one semi-metal and four metals can be found in Group 14 of the periodic table, which consists of carbon (semi-metal), silicon, germanium, tin, and lead (metals). These elements share similar chemical properties due to their arrangement in the same group.
alkali metal