Atoms and Elements Crossword Puzzle

QUESTIONS LIST: proton : a sub atomic particle with a positive charge, potassium : an element with the symbol k, twelve : the number of electrons that will be an atom which has 12 protons, shells : the electrons orbit the nucleus on these, charged : an ion is a _ particle, produced by the loss of gain of electrons, neutrons : these are found in the nucleus of an atom, eight : the maximum number of electrons that can fill the second shell, compounds : made up from two or more types of atom joined together by bonds, water : a compound that has 2 hydrogen atoms and 1 oxygen atom, lithium : name of an element found in group 1 of the periodic table, electron : this sub atomic particle has a negative charge, isotope : a form of an element that has a different number of neutrons, hydrogen : the name of the element that only has 1 proton and 1 electron.