Question

which pair of elements would form an ionic bond?
carbon (c) and oxygen (o)
strontium (sr) and chlorine (cl)
cesium (cs) and germanium (ge)
magnesium (mg) and aluminum (al)

Explanation:

Step1: Recall ionic - bond concept

Ionic bonds form between a metal and a non - metal.

Step2: Analyze each option

• Carbon (C) and oxygen (O) are both non - metals, so they form covalent bonds.
• Strontium (Sr) is a metal and chlorine (Cl) is a non - metal, so they can form an ionic bond.
• Cesium (Cs) is a metal and germanium (Ge) is a semi - metal, they do not typically form ionic bonds.
• Magnesium (Mg) and aluminum (Al) are both metals, they do not form ionic bonds.

Answer:

B. strontium (Sr) and chlorine (Cl)