Question

Why does atomic radius increases from arsenic to bismuth?

Answer 1

All Group 15 elements tend to follow the generalperiodic trends:

Electronegativity (the atom's ability of attracting electrons) decreases down the group.Ionization energy (the amount of energy required to remove an electron from the atom in its gas phase) decreases down the group.Atomic radii increase in size down the group. Electron affinity (the ability of the atom to accept an electron) decreases down the group.Melting point (amount of energy required to break bonds to change a solid phase substance to a liquid phase substance) increases down the group.Boiling point (amount of energy required to break bonds to change a liquid phase substance to a gas) increases down the group. Metallic character increases down the group. Element/SymbolAtomic NumberMassElectron ConfigurationCovalent Radius (pm)ElectronegativityFirst Ionizaton Energy (kJ/mol)Common Physical Form(s)Properties of Group 15 ElementsNitrogen (N)714.011s2 2s2 2p3753.01402Colorless GasPhosphorus (P)1530.97[Ne]3s2 3p31102.11012White Solid / Red SolidArsenic (As)3374.92[Ar] 3d10 4s2 4p31212.0947Yellow Solid / Gray SolidAntimony (Sb)51