In the covalent molecule of water,the shared electrons are more closely associated with the oxygen than with the hydrogen.This makes water a polar molecule with the hydrogen end positively charged and the oxygen end negatively charged.
A certain neutral atom has an atomic number = 19 and a mass number = 39.Which of the following are correct? 1)It has 19 electrons.
2)It has 20 protons.
3)It has 20 neutrons.
4)It has a total of 39 protons and electrons.