Name:
Active Chemistry Activity 2.2 and 2.3 Quiz
- In activity 2.2 "Elements and their properties", for Investigations step 8 you recorded your method of sorting the element cards you made. Describe that method.
- What is the difference between a physical and chemical property?
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- Circle the properties of a metal at room temperature:
dull poor conductor brittle malleable shiny good conductor liquid solid ductile - Use these words to complete the sentences in problems 4 through 8:
__________________ The smallest part of an element that still has the characteristics of that element.atom physical AMU precipitate chemical compound filtration definite proportions - __________________ Two or more elements united in definite proportions.
- __________________ A unit of mass defined as 1/12 the mass of an atom of carbon-12.
- __________________ is a method used to separate materials based upon their solubility.
- A __________________ property can be measured without changing the substance's chemical composition.
- Both protons and neutrons each have an atomic mass of 1 AMU. Helium-4 has an atomic mass of 4 AMU. Helium has 2 protons, how many neutrons does it have? _______
- Carbon-12 has 6 protons, how many neutrons does it have? _______
- A student repeats the activity 2.3 "Atoms and their masses" using a different amount of aluminum:
- ________ Mass of beaker
- ________ Mass of beaker + aluminum strip
- ________ Mass of CuCl2
- ________ Mass of dry filter paper
- ________ Mass of dry filter paper + red residue
How many grams of aluminum did the student use? ________ - How many grams of copper did the student measure in the dry filter paper? _________
- What is the ratio of the mass of copper to the mass of aluminum? ________
- If you needed to produce 8 grams of copper using this method, how many grams of aluminum would you need to start with?
- How many grams of CuCl2 would you need?
- Below sketch and label the experimental setup you used in activity 2.3 "Atoms and their masses".