Fill out blanks using the words: tiny, electrons (x2),shells, neutrons, protons(x2), nucleus, configuration 1.- Atoms consist of a central ___ containing protons and ___
2.- The nucleus is ___ compared to the size of the whole atom
3.- The particles surrounding the nucleus are called and they are located in energy levels (also called )
4.- Atoms have no electric charge because they contain the same number of ___ and electrons
5.-The way electrons are arranged intp the shells is called the electron
6.- The number of ___ in the outer shell determines the chemical reactivity of an element
7.- Neutrons and ___ make up for the vast majority of the atom's mass