RED 1. What are the properties/characteristics of metals? 2. What are the properties/characteristics of nonmetals? 3. What are the properties/characteristics of metalloids? 4. What is a pure substance? What are two kinds? 5. What is a mixture? 6. What are the single particles in an element? compound? 7. What is matter? Shiny, conductive, malleable, ductile Dull, nonconductive, brittle Some properties of metals and nonmetals – conductive but dull Matter that has definite chemical and physical properties. Elements and compounds Two or more substances not chemically combined Atom, molecule Anything that has mass and takes up space.
PURPLE 1. Given a sample of an unknown substance what steps would you use to determine its identity. 2. What do you create when you combine two atoms of elements? What type of change occurs to create this? 3. What type of change separates a mixture? A compound? 4. Why can’t we ever find a sample of of an element by itself? 5. How would you separate a box of plastic pieces, aluminum pieces, and iron pieces Use its characteristic properties – check for magnetism, calculate its density etc. You create a compound. It had to be a chemical reaction to cause them to join. A physical change can separate a mixture, a chemical change needs to happen to separate a compound Elements will naturally join with each other to fill their valence electron levels. Use a magnet to separate the iron, then put it in water and the plastic ones will float, leaving you with the aluminum ones.
ORANGE 1. How does crushing a solute increase its solubility? 2. Why is it easier to dissolve sugar in hot coffee, than in iced coffee? 3. How would you determine if a substance was a solution, suspension, or a colloid? When two poisonous elements combine is the new compound poisonous? (Yes or No) Why? What would you have to do to a compound to break it down to simpler substances? (either elements or simpler compounds) It increases the surface area allowing it to dissolve faster. The solubility of most solutes increases when you increase the temperature of the solvent. Observe particle size, distribution and light interactions. If light passes through it, and the particle are so small it looks like one thing, it is a solution. If the particles are not evenly distributed and are large enough to settle over time and it scatters light it is a suspension. You don’t have to know colloid but it would have some properties of both of the other kinds of mixtures. No, When a compound forms it gets all new properties, unlike the properties of the elements It would have to go through a chemical reaction (chemical change).
BLUE Identify the following as solution, or suspension. 1. Muddy Water 2. Salt Water 3. Lemonade Salad dressing Snow globe What is the difference between a homogeneous and a heterogeneous mixture? Give an example of each. Suspension Solution Homogeneous mixtures are the same throughout and look like one thing – coffee. Heterogeneous mixtures could be separated physically, particles are not uniformly distributed
BROWN Identify the following diagrams: A B C D E Element D Element and a compound E Compound B 2 compounds C 2 elements A
YELLOW Classify the following as a heterogeneous or homogeneous mixture. 1. Mixture that scatters light 2. Mixture easily filtered 3. Mixtures that does not scatter light 4. Mixture appears to be made of one substance. 5. Mixture that settles over time 6. Mixture made of small particles 7. Mixture made of larger particles Homogeneous Heterogeneous
Pink Station 1. What is the difference between a solute and a solvent? 2. You have a solution that has 5 parts KCl and 10 parts H20 and a solution that is 15 parts KCL and 20 parts H20. Which solution is more concentrated? How do you know? 3. What is the difference between an element a compound and a mixture? Include an example of each in your explanation. 4. If compound A is 4 Oxygen atoms and 3 Hydrogen atoms and compound B is 6 Oxygen atoms and 3 Hydrogen atoms, are they the same compound? How can you tell? 5. Which two of the substances on the chart may be the same and how can you tell? Solute is the thing that dissolves, solvent is what it dissolves into. The 15/20 ratio is more concentrated than the 5/10 (which equals 10/20). In 20 particle of water there are more particles of KCl in the 15/20 ratio Element is a single substance, smallest part is an atom, gold is an example. Compound is a combination of substances, chemically combines with a specific ratio, molecule is the smallest particle of it, water is an example Mixture is a combination of substances, not chemically combined, in any ratio, salt water, salad etc. are examples 4. They are different compounds because their ratios are not the same. 5. Substances 1 and 3 because they have similar properties.
GREEN 1. 38 dag = _______hg 2. 0.8dg = _______kg 3. 5 m = ________cm 4. 24l = _________dl 5. 100C = _________ F 32F = _________ C What is density? How do you figure it out? 3.8 hg .00008 kg 500 cm 250 liters 212 Density is the mass per unit of volume. You find it by dividing the mass by the volume.