Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science Midterm
Midterm
| Question | Answer |
|---|---|
| What is a compound that turns blue litmus paper to red? | Acid |
| What is a compound that turns red litmus paper blue? | Base |
| The number of protons in an atom of an element is called what? | Atomic number |
| A chart that contains man y facts about the elements and their atoms is called what? | Periodic Table |
| What is a dye that changes color when mixed within an acid or base? | indicator |
| What is a compound made of just the two elements hydrogen and carbon? | hydrocarbon |
| What are compounds that contain carbon called? | organic compounds |
| Matter that is made of one kind of atom is called what? | element |
| A substance formed when two or more elements combine chemically is called what? | compound |
| What is an atom that has gained or lost electrons called? | Ions |
| What is an organic compund that consists mainly of a long chain of carbon atoms? | Polymer |
| A change where two or more substances are combined chemically to form a new substance releasing in the form of heat, light, sound, etc,. | Chemical Change |
| A change in size, shape or state of matter | Physical change |
| A fuel that put together from other materials is called a what? | Synfuel |
| Achemical change in which oxygen reacts with other substances | oxidation |
| A chemical change in which a metal combines with elements such as oxygen | corrosion |
| Two or more elemts combined chemically crfeating a new substance releasing energy | Compound |
| A model of the atom developed by Niels Bohr that shows electrons moving in orbits around the nucleus of the atom | Bohr Model |
| The model of the atom that shows electrons forming a cloud as they move around the nucleus of the atom | Electron Cloud Model |
| 1,2,3 Strong acid-4,5,6,-weak acid-7,8,9,10- weak base, 11,12,13,14-strong base | PH Scale |
| a subatomic particle with a positive charge | Proton |
| A subatomic particle with a negative Charge | Electron |
| A subatomic particle with no charge | Neutron |
| A gropup of elements found vertically (up and down) on the periodic table having similar characteristics | Family |
| Dull, cannot be shaped easily, not good conductors. (i.e. hydrogen) | Non-metals |
| Shiny, can be shaped easily, good conductors of heat and electricityO (i.e. Zn+Cu- Zinc + Copper) | Metals |
| Don't combne easily with other elements (i.e. He-helium/ Ne- Neon) | Noble Gases |
| Shares properties both metals and nonmetals(i.e. Si-Silicon) | Semi-metals |
| Atoms= parts | electrons(-), Protons (+), Neutrons(0) |
| Anything that takes up space and has mass is called what? | Matter |
| Planetary Model | Electrons move around nucleus like the planets revolve around the sun |
| What is a model? | a mental picture or figure. |
| The nujmber of prtons = what? | The number of electrons. |
| How many number of known elements? | 109+ |
| How are elements grouped? | In a family |
| 4 groups of elements? | Metalsnon-metalssemi-metalsNoble gases |
| What are metals? | shiny, can be shaped easily and good conductorsof heat and electricity. |
| What are nonmetals? | dull, cannot be shaped easily,not good conductors, i.e. Hydrogen |
| Semi metals | shares properties of both metals and non metals, i.e. silicon |
| Noble gases | don't combine easily with other elements, i.e. helium, Neon |
| Waht is an energy level? | the number of electrons in each level of an atom. |
| Hydrogen and oxygen share a what? | electron |
| Chemical formula | s group of symbols that represent the elements in a compound. |
| Chemical Symbol | Letter or letters that stand for the name of the element |
| H2O- what does the small number represent? | it represents the number of atoms in the element it follows. |
| What is an organism? | any living thing. |
| Examples of a polymer? | Fabrics, plastics, and rubber. |
| Eac part of a polymer is called a what? | monomer |
| Uses of polymers? | Toys, tires, clothes |
| H2O | Water |
| CO2 | carbon dioxide |
| NaCl | Sodium chloride |
| CO | Carbon Monoxide |
| NH3 | Ammonia |
| SO2 | Sulfur Dioxide |
| Mono | one - CO1 Carabon Monoxide |
| Di | Two-CO2 Carbon Dioxide |
| Tri | Three- CO3 Carbon Trioxide |
| Tetra | Four- CO4 Carbone Tetraoxide |
| Two types of acids | strong and weak |
| salts | Fromed when acid combines with a base |
| Neutralization | a chemical change that opccurs when an acid is mixed with a base and it results in a salt and water being formed. |
| phases of matter- solid | matter that has definite shape and definite volume. Molecules tightly packed with little room for movement |
| Liquid | matter that has no definite shape or no defintie volumes. Molecules are spread out space in between for more movement |
| Gas | matter that has no definite shape or no definite volume. molecules are spread out for a lot of movement |
| Plasma | the most common state of matter. it is found in stars and bacause of extreme temperatures. |
| Two types of chemical reactions | Composition- coming together- Elements combine to form a compoundCompound braks down into an element |
| Law of conservation of mass | matter is neither created nor destroyed through chemical reaction- i.e. flash bulb has same mass before and at its use. |
| Mass | a measurement of the amount of matter in an object. |
| Oxidation | a chemical reaction or change in which oxygen reacts with a substance |
| Two kinds of oxidation | Rapid and slow |
| Corrosion | sloq oxidation- a c hemical reaction which metal reacts with a substance |
| rapid oxidation | a form of oxidation that happens quickly,i.e. burning- rapid oxidation can be dangerous- i.e. explosion |
| synfuel | synthetic fuel made by artificial materials, i.e. methane (CH4) gasohol |
| Nuclear Reaction | a reaction where the nuclei or nucleus of an atom is changed |
| Radioactive elements | Elements whose nuclei naturally breakdown. Very active, i.e. uranium, plutonium and radium |
| gamma rays | form of energy that you cannot see or feel but they can pass through materials |
| radiation | harmful particles of gamma rays given off by radioactive elements |
| Nuclear fission- splitting apart | Type of nuclear reaction which large nuclei of uranium is split apart to generate large amounts of energy |
| Nuclear reactor | Device in which controls a nuclear reaction |
| Parts of a nuclear reactor | Core, Control rods, Liquid, Shielding |
| Core | Controls the fuel - uranium |
| Control Rods | controls the speed of the nuclear reaction |
| Liquid | carries away the heat ( coolant cools down the reaction) |
| Shielding | stops radiation from getting out (lead) |
| Nuclear Nuclear Power Plant | use heat to released in a nuclear reaction in the form of steam to create electricity |
| Advantages of a nuclear power plant | Conserve fossil fuelsdoe not polluteafter built, does not cost a lot to run |
| Disadvantages of a nuclear power plant | Gives off radiationRadioactive waste are produced |
| How other priducgts of reactors are used | used in cancer treatmentcancer researchdiagnosis |
| Nuclear Fusion | A change in which small nuclei (hydrogen) come together to form a large helium nuclei |
| Fusion begins with the smallest of all atoms these being | Hydrogen |
| Advantages of nuclear fusion | fuel source(H) is easily found and inexpensiveNo radiation, no pollutionProduces more energy than fission or chemical reactionconserves fossil fuels |
| Disadvantages of nuclear fusion | Extrme temperatures are needed to create fusion reactionNeeds large amount od energy to reach temperature for fusion to occuruses more energy than it creates |
| Describe a fusion reaction that takes place on the sun | Hydrogen+Hydrogen-Helium |
| Chernobyl | Accident that caused fire which destroyed containment building. Widepsread radiation contamination. Many people killed and harmed |
| 3 mile island | Middletown, PA,1979. Lost coolant partial core meltdown due to equipment failure and human error, no loss of human life. |
Created by:
stet3
Popular Chemistry sets