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Science
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| Question | Answer |
|---|---|
| which of the following is/are not a chemical property(ies) of matter: Reactivity, Acidity, Density, Color | Density and Color |
| If an oil (density = 0.8 g/mL) was added to water, would it settle above or below the water? | above |
| Which two of the following are examples of a physical change: Burning leaves, Baking soda and vinegar producing CO2, Dissolving cool-aid in water, melting ice, iron rusting | Dissolving cool-aid in water and melting ice |
| Which state of matter has no definite shape or volume: Solid, Liquid, Gas | Gas |
| Which state of matter has no definite shape, but does have a definite volume | Liquid |
| What is the freezing temperature of a substance that on a graph goes down at 90, levels out at 80 then drops. | 80 degrees celsius |
| According to the graph before, as a substance freezes | the temperature remains constant |
| Define Isotope | two atoms that differ in # of neutrons and mass |
| define compound | two or more elements bound chemically |
| define mixture | two or more elements that can be physically seperated |
| define solution | physical mixture of two or more substances |
| define element | (periodic table) simplest form that retains property of substance |
| which examples represent a chemical change: Burning leaves, Baking soda and vinegar producing CO2, Dissolving cool-aid in water, melting ice, iron rusting | Burning leaves, Baking soda and vinegar producing CO2, Iron rusting |
| define solute | substance that is dissolved |
| define solvent | substance doing the dissolving |
| define solution | solute + solvent |
| Rutherford used a Gold Foil experiment to explain the structure of the atom. What did his experiment show? | The atom is mostly empty space. Nucleus is center. |
| Atomic Number | The amount of protons |
| Proton | positive charge, in nucleus, with a mass of one |
| Neutron | neutral charge, in nucleus, with a mass of one |
| Electron | negative charge, outer rings, without mass |
| mass number | total mass or the sum of protons and neutrons |
| if an atom is neutral the number of _______ and _________ must be the same. | protons and electrons |
| how many electrons do you need to make an atom with eleven protons neutral | 11 |
| which atom has 11 protons | Sodium |
| how many protons, neutrons, and electrons are found in Bromine | 35 protons, 45 neutrons, and 35 electrons |
| An ion of calcium has 20 protons and 18 electrons. An ion of Lithium has 3 protons and 2 electrons. These ions would... | repel |
| potassium is in group 1 on the periodic table. predict the ion that potassium will form when reacting. | K+1 |
| Oxygen in group 16 on the periodic table forms an ion when reacting. Predict the ion that oxygen will form. | O-2 |
| The noble gases, group 18, don't form ions and don't react. Why is this? | The outside electronic shell is filled = stable, 8 valence electrons |
| what is the chemical symbol for Antimony | Sb |
| What is the chemical symbol for Phosphorous | P |
| what is the chemical symbol for Tungsten | W |
| what isthe chemical symbol for Xenon | Xe |
| Elements in group 15 of the periodic table,such as Nitrogen have ___ valence electrons | 5 |
| valence electrons are significant because they: | are involved (transferred or shared) in chemical reactions |
| Choose the maximum number of electrons that can fill the first, second and third respective energy levels | 2,8,8 |
| What is the charge of the following ion? 8 protons, 7 neutrons, 10 electrons | -2 |
| Which ion has 8 protons, 7 neutrons, 10 electrons and a charge of -2 | O -2 |
| Which of the following would gain electrons during chemical bonding: Calcium, Lithium, Sulfur, and Chromium | Sulfur |
| The sharing of electrons by atoms is called | Covalent bonding |
| The transfer of electrons by atoms are called | Ionic Bonding |
| Which two elements are most likely to form an ionic bond: Magnesium and Lithium, Strontium and Chlorine, Sulfur and Oxygen, Magnesium and Sulfur | Strontium and Chlorine |
| Which element would be most likely to combine with lithium: Beryllium, Iron, Fluorine, Barium | Fluorine |
| Which two elements are most likely to form a covalent bond: Magnesium and Lithium, Strontium and Chlorine, Sulfur and Oxygen, Magnesium and Sulfur | Sulfur and Oxygen |
| If sodium has an oxidation number (charge) +1, and Sulfur has an oxidation number (charge) of -2, what is the correct formula for the compound | Na2S |
| How can one distinguish that a chemical change has taken place | Atomic bonds are broken and created, A new substance forms, A change in energy takes place (gaining or loosing energy) |
| Balance the following equation: ______ C2H6 + ______ O2 ---> ______ CO2 + _______ H2O | 2C2H6+7O2 ---> 1CaSO3+2Na |
| Balance the following equation: ______ Na2SO3+ ______ Ca ---> ______ CaSO3 + ______ Na | 1Na2SO3+1Ca ---> 1CaSO3+2Na |
| Which of the following is not a chemical reaction: Roasting a marshmallow, Dissolving sugar in tea, Oxidizing (patina) a copper statue, Grinding up a crystal to a fine powder | Dissolving sugar in tea, Grinding up a crystal to a fine powder |
| When dissolving sugar in tea, sugar is the ______ and water the ______ | Solute, Solvent |
| Elements in the first group or family in the periodic table usually ____ electrons to form an ion with a charge of __ | Lose,+1 |
| Elements in group 17, or the halogens usually ____ electrons to form a __ ion | Gain,-1 |
| Which of the following would be most likely to lose electrons: Carbon, Oxygen, Calcium, Fluorine | Calcium |
| Which of the following atoms would be most likely to combine with fluorine: Chlorine, Bromine, Sulfur, Strontium | Strontium |
| Alka-Seltzer is dissolved in an air tight container, and a gas evolves from the solution. The mass of the container is | The same before and after the reaction |
| If a reaction is endothermic, the products have ____ energy than the reactants | more |
| The dissolution of Sodium Hydroxide in water is an exothermic reaction. When dissolving the salt, the beaker of water will become ___ to the touch | Hot |
| Methods to increase the speed of a reaction include | Increased temp (for endothermic), decrease surface area, addition of a catalyst, stirring or mixing, increased concentration |
| Acids taste ____, bases taste ______ | sour, bitter |
| Acids turned indicator paper ___ in our lab | red |
| Bases turned our indicator paper ____ in lab | blue |
| The following is a(n) ____ reacting with a metal: HCl + Al ---> AlCl3 + H2 | Acid |
| you mix equal volumes and concentrations of an acid and a base. The resulting pH would be | exactly 7 |
| An organic compound is based on which atom | Carbon |
| Which of the following hydrocarbons is unsaturated: H3C---CH3, H2C==Ch2, H3C---CH2OH | H2C==CH2 |
| what is the monomer (building block) for proteins | Amino acids |
| What is made of monomers called fatty acids. | Lipids |
| What is Alpha radiation | Helium nuclei |
| Beta radiation | An electron |
| Gamma radiation | Ray (not a particle) |
| Which radioactive decay is the most penetrating | Gamma |
| Which radioactive decay is the least penetratin | Alpha |
Created by:
anikabingham
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