Question

1. atomic radius

a) define atomic radius:

Explanation:

Atomic radius is a fundamental concept in chemistry. It is defined as the distance from the center of an atom's nucleus to the outermost shell of electrons. This measurement helps in understanding the size of atoms, which in turn influences various chemical properties such as bonding, reactivity, and physical characteristics. Different methods like the covalent radius (for covalently bonded atoms), metallic radius (for metals), and van der Waals radius (for non - bonded atoms in close proximity) are used to measure atomic radius depending on the context.

Answer:

Atomic radius is the distance from the center of an atom's nucleus to the outermost shell of electrons.