Question

4-7. give the elemental symbol for the element with the greater ionization potential, chlorine or bromine
______ electronegativity, potassium or calcium
______ metallic properties, lanthanum or zirconium
______ nonmetallic properties, carbon or nitrogen

Explanation:

Step1: Analyze ionization potential

Ionization potential increases across a period and decreases down a group. Chlorine (Cl) and bromine (Br) are in the same group (Group 17), and Cl is above Br. So Cl has a greater ionization potential.

Step2: Analyze electronegativity

Electronegativity increases across a period. Potassium (K) and calcium (Ca) are in the same period (Period 4), and Ca is to the right of K. So Ca has a greater electronegativity.

Step3: Analyze metallic properties

Metallic properties decrease across a period. Lanthanum (La) is a lanthanide - metal and zirconium (Zr) is a transition - metal. Zr is more to the right in the periodic table. La has greater metallic properties.

Step4: Analyze non - metallic properties

Non - metallic properties increase across a period. Carbon (C) and nitrogen (N) are in the same period (Period 2), and N is to the right of C. So N has greater non - metallic properties.

Answer:

1. Cl
2. Ca
3. La
4. N