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\no 15.\no 16.\no 17.\no 18.

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\no 15.\no 16.\no 17.\no 18.

Answer

Answer:

17

Explanation:

Step1: Recall group - property trends

Elements in group 17 (halogens) have a range of physical states at room temperature. Fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid. This matches the given data of elements having gas, liquid and solid phases at room - temperature.

Step2: Analyze other groups

Group 15 elements are mainly solids (except nitrogen which is a gas) and do not have this combination of phases as in the data. Group 16 elements also do not have this characteristic combination. Group 18 elements (noble gases) are all gases at room temperature. So, the elements are most likely in group 17.