Question

label the following elements as metal, non - metal, or metalloid

Explanation:

Step1: Recall element - type rules

Elements on the left - hand side and middle of the periodic table are metals, non - metals are on the right - hand side, and metalloids are along the staircase line.

Step2: Categorize carbon (C)

Carbon is a non - metal as it is located on the right side of the periodic table and has non - metallic properties such as poor electrical conductivity.

Step3: Categorize boron (B)

Boron is a metalloid. It lies along the staircase line on the periodic table and has properties intermediate between metals and non - metals.

Step4: Categorize sodium (Na)

Sodium is a metal. It is on the left side of the periodic table and has typical metallic properties like being a good conductor and malleable.

Step5: Categorize chlorine (Cl)

Chlorine is a non - metal. It is on the right side of the periodic table and is a poor conductor of heat and electricity.

Step6: Categorize germanium (Ge)

Germanium is a metalloid. It is along the staircase line and has properties that are a blend of metallic and non - metallic characteristics.

Step7: Categorize gold (Au)

Gold is a metal. It is in the middle of the periodic table and has excellent electrical conductivity, malleability, and ductility.

Step8: Categorize potassium (K)

Potassium is a metal. It is on the left side of the periodic table and is highly reactive and a good conductor.

Step9: Categorize oxygen (O)

Oxygen is a non - metal. It is on the right side of the periodic table and is a poor conductor.

Answer:

C: Non - metal
B: Metalloid
Na: Metal
Cl: Non - metal
Ge: Metalloid
Au: Metal
K: Metal
O: Non - metal