Test 2 (Chapters 3-4) Flashcards
Electron Configuration
The arrangement of an atom’s electrons in its quantum shell
Alkali Metals
The elements in the first column of the periodic table, with the exception of hydrogen
Halogens
Elements in column 17, the next to last column of the periodic table
Inert or Noble Gases
Elements in column 18, the last column of the periodic table
Define Valence Shell
The outermost quantum shell of an atom
Define Valence Electrons
The electrons contained in an atom’s valence shell
Lewis or Electron dot structures
Notations that show only the valence electrons of an atom, arranged as dots around the element’s symbol
Octet Rule
Atoms often react to obtain exactly eight electrons in their valence shell
Ion
An atom or a group of atoms that carries an electrical charge
Cation
A positively ion
Anion
A negatively charged ion
Compression Ratio
A measure of the extent to which the fuel-air mixture is compressed during the compression stroke
Knocking
A metallic pinging sound sometimes heard from automobile engines when the air-fuel mixture combusts erratically in pockets, instead of in one smooth wave emanating from the spark plug
Biofuels
Fuels derived from living matter or biomass, a renewable resource
Carbon Cycle
A global cycle in which carbon is exchanged among the atmosphere, the oceans, geological systems, and living things
Carbon Taxes
An alternative to carbon cap and trade, wheerby a tax is levied on the use of fossil fuels
Cap and Trade
A system whereby total CO2 emissions are limited or capped by a government body. Participants in the system, such as electric utilities, buy permits allowing them to emit defined amounts of CO2. Those who emit less then their quota can sell their excess allowances to others in the system.
Catalytic Converter
A device built into an automobile’s exhaust system that uses catalysts to reduce the levels of hydrocarbons, carbon monoxide, and other pollutants emitted
Oxygenate
An oxygen-containing compound added to gasoline to improve oxidation of fuel and decrease harmful emissions
Greenhouse Effect
A process by which infrared radiation is trapped by certain atmospheric gases, thereby warning Earth’s surface and lower atmosphere
Infrared Radiation
A type of radiation that we sense as heat
Greenhouse Gases
Gases that trap infrared radiation in the atmosphere
How many electrons are in each Quantum shell for Period 1?
1 shell =2 electrons
How many electrons are in each Quantum shell for Period 2?
1st shell= 2 electrons
2nd shell= 8 electrons
How many electrons are in each Quantum shell for Period 3?
1st shell= 2 electrons
2nd shell= 8 electrons
3rd shell= 8 electrons
Electronegativity Scale
<0.5 EN =Covalent Bond
0.5-1.5= Covalent Polar
>1.5= Ionic Bond
Name some non-renewable resources
petroleum
natural gas
coal
Name some renewable resources
wind solar water biofuels any vegetable oil
What are the 4 steps of “Stroke Engine”
Intake:
Air-fuel mixture enters cylinder as piston moves downward
Compression:
Air-fuel mixture is compressed as piston moves upward
Power:
Spark plug fires, causing explosion that forces piston downward
Exhaust:
Piston pushes up, forcing exhaust gases out of cylinder
Name the 4 parts of the Earth’s crust
Lithosphere
Hydrosphere
Biosphere
Atmsophere
Define Carbon Footprint
The amount of carbon dioxide and other carbon compounds emitted due to the consumption of fossil fuels by a particular person, group, etc.
Which has the lowest and the highest carbon footprint? (Solar Energy, Wind Energy, Fossil Fuels)
Lowest: Solar Energy
Highest: Fossil Fuels