Marcus discovered that sodium (na) is found in group 1, period 3 on the periodic table. where should marcus look to find another element that has similar properties to those of sodium? a in group 1 b in period 3 c on the opposite side of the periodic table d at elements whose symbols begin with the letter n the diagram shows a test tube of pure copper (ii) sulfate, cuso4, solution before, during, and after the addition of iron, fe, shavings. image 9c3898c4b1ac4df0b1cbbb42fdbf2cbd which of the following correctly makes and supports a claim about the change that occurred? a a physical change occurred which is evidenced by the change in color of the solution. b a chemical change occurred which is evidenced by the change in color of the solution. c a physical change occurred which is evidenced by the dissolved iron in the solution. d a chemical change occurred which is evidenced by the dissolved iron in the solution. the table shows the procedure for an experiment. step procedure 1 crush 5 grams of salt into a fine powder. 2 transfer the powder to a beaker filled with 30 milliliters of liquid water. 3 place the beaker on a hot plate and stir to dissolve the powder. 4 boil water until all of the liquid water evaporates and the solid salt is left in the beaker. which best describes the change that occurred? a physical change because the atoms rearranged to form a new substance b chemical change because dissolving a solid into a liquid cannot be reversed c chemical change because the state of the salt changed from solid to liquid when dissolved d physical change because the chemical properties of the salt and water remained the same lewis has two spheres made of different substances. sphere a has a volume of 19.4 cubic centimeters and a mass of 24.0 grams. sphere b has a volume of 17.0 cubic centimeters and a mass of 13.6 grams. lewis knows that the density of water is 1.0 gram/cubic centimeter. if lewis places both spheres in a tub of water, which will float? a sphere a will float because it is less dense than sphere b. b sphere a will float because it has more mass than water. c sphere b will float because it has less mass than sphere a. d sphere b will float because it is less dense than water. the park groundskeeper rakes leaves in the fall. which of the following is a physical change he could apply to the leaves? a setting them on fire b allowing them to decay c shredding them into smaller pieces d putting them in acid to break them down eliana creates a model of an atom of the element sodium (na). she uses white pom-poms to represent electrons, black pom-poms to represent neutrons, and yellow pom-poms to represent protons. using the periodic table, which statement correctly describes her model? select all that apply. a her model uses eleven white pom-poms. b her model uses twelve black pom-poms. c her model uses eleven black pom-poms. d her model uses twelve white pom-poms. e her model uses eleven yellow pom-poms. f her model uses twenty-three yellow pom-poms. the diagram below shows what happens with two substances, a and b, are mixed together. image which of the following could explain why the two liquids formed distinct layers? a the liquids have different colors. b the liquids have different densities. c the liquids have different volumes. d the liquids have different states of matter. gracie hasn't ridden her bike in a few years and has now decided to sell it at her mom's garage sale. when she gets the bike out from under her deck, she makes the following observations about the bike. the bike is rusted. the seat cover has a smooth texture. the front basket of the bike is purple. which of the following choices describes the properties gracie observed? a physical properties: color, texture, ability to rust chemical properties: none b physical properties: none chemical properties: color, texture, ability to rust c physical properties: color, ability to rust chemical properties: texture d physical properties: color, texture chemical properties: ability to rust santi has two balloons. one balloon is filled with 1 liter of helium gas, and the other is filled with 1 liter of liquid water. santi places each balloon into separate, sealed 8 l containers. the pictures show the sealed containers and balloons. when both balloons burst, they release their contents into the sealed containers. after a few moments, what will be the volume of helium gas and liquid water in the containers? a container a will have 1 liter of helium, and container b will have 1 liter of water. b container a will have 1 liter of helium, and container b will have 8 liters of water. c container a will have 8 liters of helium, and container b will have 1 liter of water. d container a will have 8 liters of helium, and container b will have 8 liters of water.