A sodium atom contains 11 protons and 11 electrons. A chlorine atom contains 17 protons and 17 electrons. What must occur for a sodium atom to obtain a charge of 1+ and a chlorine atom of 1-?

6. what does the symbol ah stand for? o one calorie given off by a reaction the specific heat of a substance the heat capacity of a substance the heat of reaction for a chemical reaction

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.