Answer:
valence electrons
electron dot structures
Explanation:
Valence electrons -
It refers to the number of electrons that are present on the very last shell of any atom , is referred to as valence electrons .
Valence electrons are responsible to show any chemical properties of the atom .
Hence , the answer of the first part is - valence electrons .
Electron dot structures -
It is the structural representation , where the symbol of the element is placed at the center and the electrons are arranged surrounding it .
Hence , the answer of the second part is - electron dot structures .