The type of bond between atoms of potassium and chloride in a crystal of potassium chloride a. hydrogen bond b. ionic bond c. polar covalent bond d. pure covalent bond e. metallic bond

It's an ionic bond because potassium is a metal and chlorine is a non-metal so the potassium donates an electron to the chlorine and so the potassium becomes a positive ion and the chlorine becomes a negative chloride ion. Opposite ion charges attract so an ionic lattice is formed.