A strong chemical bond is formed from the transfer or sharing of electrons between atomic centers and relies on the electrostatic attraction between the protons in nuclei and the electrons in the orbitals. The types of strong bond differ due to the difference in electronegativity of the constituent elements.
The name Nubia is of Egyptian origin. The meaning of Nubia is from Nubia Africa, gold. Nubia is generally used as a girl's name. It consists of 5 letters and 3 syllables and is pronounced Nu-bi-a. Transferred use of the name of an ancient kingdom in Africa, which in turn may have derived from the Egyptian word nbw meaning gold.
Most likely it refers to two separate groups: the Nuba, a people from southeast of Nubia, and a people later known as the Nobatae, a group of unknown origin who invaded Nubia during the decline of Meroe and most likely founded the kingdom of Nobatia and gave their name to Nubia itself. Lobban, Richard. Noba..