Fill in the blanks on the given sentence
Answer (1)
Answer:Here are the answers to complete the sentences, based on general chemistry principles:Molecules are a group of atoms bound together by covalent bonds.Covalent bonds exist between non-metal atoms, which have small electronegativity difference.Two non-metal atoms can form a maximum of four covalent bonds between each other depending on the number of electron pairs that they need to share to attain a noble gas configuration.VSEPR theory describes the three-dimensional arrangement of atoms within a molecule or polyatomic ion. (VSEPR stands for Valence Shell Electron Pair Repulsion)For two electron pairs in an atom to be as far apart as possible, they should be at a 180 angle from each other.Three electron pairs in an atom are widely separated at a 120 angle to one another, forming an equilateral triangle.The higher electronegativity value of atoms determines the type of bonding present in a substance.The higher electronegativity value of an element means that it has stronger attraction for a shared electron in a chemical bond.Fluorine, with electronegativity value of 4.0, is the most electronegative of all elements.Francium and Cesium are the least electronegative elements, with 0.7 electronegativity.The polarity of substances determines their solubility in different solvents.A polar solute always dissolves in a polar solvent.A nonpolar solute dissolve in a nonpolar solvent.
