Question

For which of the properties does lithium (Li) have a larger value than potassium (K)?

A) First ionization energy
B) Atomic radius
C) Ionic radius
D) Number of protons
E) Molecular weight

Answer 1

Lithium (Li) has a larger value than potassium (K) for first ionization energy, atomic radius, and number of protons.

Step-by-step explanation:

Out of the given properties, lithium (Li) has a larger value than potassium (K) for the following:

1. First ionization energy: Lithium has a larger first ionization energy because it is closer to the noble gas configuration. It requires less energy to remove the third electron from lithium compared to removing the fourth electron from potassium.
2. Atomic radius: Lithium has a smaller atomic radius than potassium. The atomic radius decreases as you move across a period from left to right in the periodic table.
3. Number of protons: Lithium has fewer protons than potassium. The number of protons determines the element's atomic number.