I NEED SOME HELP WITH MY CHEMISTRY!! What are the differences between an ionic bond and a covalent bond? A compound is when two or more _____ chemically bond together. atoms neutrons mixtures Question Which is an example of a compound whose individual elements are very dangerious, but when combined make a useful compound? Table Salt Sodium Metal Chlorine Gas Question 4 Which is an example of an element that when in it's elemental form, are very dangerious, but when combined with another element, makes a useful compound? Sodium metal Iron metal Table Salt Question 5 Which of the following is the correct formula for the element when in its natural state? H H2 Mg2 Question 6 Lewis proposed that: Elements are most stable when they contained eight electrons in thier valence shell. Chemical bonds are formed because of electron interaction between the elements. Atoms with fewer than eight valence electrons bond by sharing electrons. Question 7 Match the terms with their definitions. Match Term Definition Ionic bond A) The electrostatic force holding together particles of an ionic compound. Ionization B) The amount of energy needed remove electrons from atoms. Ionization energy C) The tendency of an atom to gain electrons when forming bonds. Electron affinity D) A characteristic of ionic compounds Crystal lattice E) The process of removing electrons from atoms to form ions.