Solutions for Numbergrid Puzzles. Just find the unique puzzle id for the puzzle you're working on and enter it below to find the solution. For Numbergrid puzzles, the unique ID is a series of eight numbers and/or letters, and is printed below each individual puzzle in the PDF. (i.e. SFA8229A).
The chemical bonding that holds the atoms of a metal together. This bond is formed from the attraction between mobile electrons and fixed, positively charged metallic atoms.
Polar Covalent Bond. The chemical bond can be defined as the interaction between two elements which helps them close to each other. Elements involve in the formation of chemical bonds with the help of their valence electrons. There are mainly two types of chemical bonds; Ionic and covalent.