Mary and Ron are discussing the properties of water. Mary says that when water freezes, it becomes less dense than liquid water. Ron says it becomes more dense. Who is correct and why? (2 points) a
Ron, because ice molecules are smaller than liquid water molecules

b
Ron, because ice sinks in liquid water

c
Mary, because ice molecules are larger than liquid water molecules

d
Mary, because lakes and ponds freeze at the bottom first

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.