Reference no: EM132610705

Question 1: Atoms

a. Identify two attractive forces at work in an atom, and identify the kinds of particles each force acts between.

b. Identify the element whose atoms have 12 protons. Is it a metal, a nonmetal, or a metalloid? How does an atom of this element change when it forms an ionic bond?

Question 2: Fluids

A robotic submersible is being brought back on board a ship. What happens to the tension in the cable as the submersible is lifted out of the water? Write sentences to explain your reasoning.

Question 3: Heat

a. If 0.45 kg of iron at 140°C is added to 1.5 kg of water at 22°C, what will be the final temperature of the system?

b. Write sentences describing how to recognize an exothermic reaction and how the energy of the products of an exothermic reaction compares with the energy of the reactants. (4 points)

c. The temperature of a substance does not change as it condenses. Write sentences to explain why this happens at a molecular level.