eriq, a chemist, is running tests with four unknown elements. he has found that they all bond the same way…
eriq, a chemist, is running tests with four unknown elements. he has found that they all bond the same way, so he knows that they are in the same group on the periodic table of elements. the table shows other properties that eriq observed.\nproperties of four unknown elements\n|element #|melting point|boiling point|phase at room temperature|\n|----|----|----|----|\n|1|266 k|332 k|liquid|\n|2|172 k|239 k|gas|\n|3|387 k|457 k|solid|\n|4|53 k|85 k|gas|\nthese four elements are most likely in group\n○ 15.\n○ 16.\n○ 17.\n○ 18.
Answer
Explanation:
Step1: Recall group - property relationships
Elements in the same group have similar bonding behavior. Group 18 elements are noble gases which are generally unreactive and have distinct physical properties. Group 15 elements have a variety of physical states but are mainly non - metals with specific bonding patterns. Group 16 elements include oxygen, sulfur etc. with characteristic properties. Group 17 elements are halogens.
Step2: Analyze the physical states
Halogens (Group 17) can exist in different phases at room temperature. Fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid. This matches the variety of phases (gas, liquid, solid) shown in the table for the unknown elements.
Answer:
17