What does the electronegativity of an atom indicate? O A. The energy required to gain or lose an electron
O B. The tendency of the atom to pull on electrons
O c. The measurement of the charge of an ion
O D. The effect the valence electrons have on core electrons

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

How many moles of oxygen react with 12 moles of aluminum

Which of the following is a physical property flammability heat of combustion solubility and toxicity