Copper (Cu)
Phosphorus (P)
Xenon (Xe)
Bromine (Br)
Strontium (Sr)
Beryllium (Be)
Let's identify each element based on the provided descriptions:
The transition metal in the same period as potassium and the same family as silver:
Element: Copper (Cu)
Explanation: Copper (Cu) is in the same period (Period 4) as potassium (K) and belongs to the same family (Group 11) as silver (Ag).
The semi-metal in the fourth period and in Family 15:
Element: Phosphorus (P)
Explanation: Phosphorus (P) is a semi-metal and is located in Period 4 of the periodic table. It is part of Family 15 (Group 15) or the nitrogen family.
The noble gas approximately the same size (in the same period) as iodine:
Element: Xenon (Xe)
Explanation: Xenon (Xe) is a noble gas located in the same period (Period 5) as iodine (I) and exhibits similar atomic sizes.
The non-metal that naturally occurs as a liquid:
Element: Bromine (Br)
Explanation: Bromine (Br) is a non-metal that exists as a liquid at room temperature and is the only non-metal that is naturally liquid.
The element with similar chemical properties to rubidium but closer in size to barium:
Element: Strontium (Sr)
Explanation: Strontium (Sr) belongs to the alkaline earth metals and is similar in chemical properties to rubidium (Rb) but is closer in size to barium (Ba).
The alkaline earth metal that is smallest in size:
Element: Beryllium (Be)
Explanation: Beryllium (Be) is the alkaline earth metal that is the smallest in size among the elements in this group.