Chemistry Periodic table pratcie.docx - 2.3.5 Practice...

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2.3.5 Practice: Atomic Structure Practice Chemistry I Points Possible: 25 Name: Jayden Ellis Date: Question 1: Laws of Conservation of Matter and Energy (2 points)
i. What does the law say about matter?
ii. What about matter can change and what does not change, according to the law?
b. Law of conservation of energy the total energy of an isolated system remains constant i. What does the law say about energy?
ii. What about energy can change and what does not change, according to the law?
Question 2: Phases of Matter (2 points) a. What are the four states, or phases, of matter? Describe the shape and volume properties of each phase. Can they change, or are they fixed?
i. Solid Shape: A fixed shape Volume: varies on the size ii. Liquid Shape: No definite shape, takes shape of whatever object it is in Volume: Varies on amount of liquid iii. Gas Shape: No shape Volume: no definite volume iv. Plasma Shape: no fixed shape Volume: no fixed volume b. When heat energy is absorbed by matter, the matter's temperature increases. When heat energy is released by matter, the matter's temperature decreases. The matter can also change from one phase to another when heat energy is absorbed or released. Identify whether matter absorbs heat or releases heat as each of the following phase changes occur.
i. From solid to liquid (melting) Absorbing heat ii. From liquid to solid (freezing or hardening) Releasing heat iii. From liquid to gas (evaporation) Absorbing heat iv. From gas to liquid (condensation) Releasing heat

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