Chapter 1 - The Nature of Chemistry - Questions for Review and Thought - Topical Questions - Page 41d: 66

There are 18 elements in the fourth period of the periodic table. They are: Potassium (K), a metal Calcium (Ca), a metal Scandium (Sc), a metal Titanium (Ti), a metal Vanadium (V), a metal Chromium (Cr), a metal Manganese (Mn), a metal Iron (Fe), a metal Cobalt (Co), a metal Nickel (Ni), a metal Copper (Cu), a metal Zinc (Zn), a metal Gallium (Ga), a metal Germanium (Ge), a metalloid Arsenic (As), a metalloid Selenium (Se), a nonmetal Bromine (Br), a nonmetal Krypton (Kr), a nonmetal

Use the periodic table inside the front cover. The fourth period is the fourth row counting from the top. The elements are color-coded: purple elements are nonmetals, orange elements are metalloids, and grey or blue elements are metals.