Classify the following as metals,metal looks, or nonmetals

chlorine
Sulfur
Phosphorus
Potassium
germanium
cobalt
nickel

chlorine: nonmetal

sulfur: nonmetal
phosphorus: nonmetal
potassium: metal
germanium: metalloid
cobalt: metal
nickel: metal

To classify the given elements as metals, metalloids, or nonmetals, we can refer to the periodic table.

1. Chlorine: Nonmetal
2. Sulfur: Nonmetal
3. Phosphorus: Nonmetal
4. Potassium: Metal
5. Germanium: Metalloid (Metal look)
6. Cobalt: Metal
7. Nickel: Metal

So, the classification of the given elements is:
- Metals: Potassium, Germanium, Cobalt, Nickel
- Metalloid (Metal look): Germanium
- Nonmetals: Chlorine, Sulfur, Phosphorus