Find the period and group of an element, if the atomic number is known. How to check if the element forms covalent or electrovalent bonds with another element?

Dear Student, Covalent bonding generally happens between nonmetals. Each of the participating non metals share an electron to form a bond. Ex. Cl2 (Cl-Cl), O2 (O=O). The bond between a metal and a non-metal involves transfer of electrons from metal to non-metal forming positive and negative ions. Bonds which are held together by electrostatic force of attractions between the different charged ions is called ionic bond, example are held together by ionic bond. Na+, Cl- The bond between a non-metal and a non-metal involves sharing of electrons, symmetrically between the atoms to form molecules. This type of bond is called covalent bond, example C—C bond in methane. Therefore ionic bonds are formed between metals and non-metals and covalent bonds are formed between two non-metals. Regards