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Chapter 22: Problem 12

Identify each of the following elements as a metal, nonmetal, or metalloid: (a) gallium, (b) molybdenum, (c) tellurium, (d) arsenic, (e) xenon, (f) ruthenium.

Short Answer

Expert verified
(a) Gallium (Ga) is a metal, (b) Molybdenum (Mo) is a metal, (c) Tellurium (Te) is a metalloid, (d) Arsenic (As) is a metalloid, (e) Xenon (Xe) is a nonmetal, (f) Ruthenium (Ru) is a metal.

Step by step solution

01

Locate the elements on the periodic table

To identify whether they are metals, nonmetals, or metalloids, locate each element on the periodic table as shown: (a) Gallium (Ga): Group 13, Period 4 (b) Molybdenum (Mo): Group 6, Period 5 (c) Tellurium (Te): Group 16, Period 5 (d) Arsenic (As): Group 15, Period 4 (e) Xenon (Xe): Group 18, Period 5 (f) Ruthenium (Ru): Group 8, Period 5
02

Categorize the elements based on their position

Given the positions of these elements on the periodic table, we can now identify whether they are metals, nonmetals, or metalloids by analyzing their location on the table. (a) Gallium (Ga): Group 13, Period 4 - This element is located on the left side of the metalloid staircase, so it is a metal. (b) Molybdenum (Mo): Group 6, Period 5 - This element is well to the left of the metalloid staircase, so it is a metal. (c) Tellurium (Te): Group 16, Period 5 - This element is located directly under Selenium along the metalloid staircase, so it is a metalloid. (d) Arsenic (As): Group 15, Period 4 - This element is located directly under Phosphorus along the metalloid staircase, so it is a metalloid. (e) Xenon (Xe): Group 18, Period 5 - This element is a noble gas, and it is located on the far right of the table, so it is a nonmetal. (f) Ruthenium (Ru): Group 8, Period 5 - This element is well to the left of the metalloid staircase, so it is a metal.
03

State the element classifications

Based on steps 1 and 2, the following classifications can be made: (a) Gallium (Ga) is a metal, (b) Molybdenum (Mo) is a metal, (c) Tellurium (Te) is a metalloid, (d) Arsenic (As) is a metalloid, (e) Xenon (Xe) is a nonmetal, (f) Ruthenium (Ru) is a metal.

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