chemfinalah
Help!
|
|
||||
|---|---|---|---|---|---|
| scientist believe they know the average global temperature over the last 160,000 years. which property of the ice core samples from antarctica provides the information | the carbon dioxide cocentration
🗑
|
||||
| which atmospheric component does not contribute to global warming | N2
🗑
|
||||
| what international agreement attempted to reduce greenhouse gas emissions | kyoto protocol
🗑
|
||||
| carbon dioxide is the primary compound discussed with respect to global warming, of the common atmospheric components the global warming potential (GWP) of a carbon dioxide molecule is very low. which statement best explains pair of facts | co2 exists in relativley high concentration
🗑
|
||||
| scientist have correlated average global temperature with atmospheric carbon dioxide levels for the last 160,000 years using cores from antarctica. how is the carbon dioxide level determined | by measuring the Co2 concentration in trapped gases in the ice layers
🗑
|
||||
| where is most of the carbon on earth stoked | in the form of fossil fuels and carbonate minerals and rocks
🗑
|
||||
| the industrial revolution is a key point in the earths atmospheric history | prior to that time deposits of petroleum and coal were not being used as energy sources
🗑
|
||||
| which occurrences or processess are expected to reduce the level of atmospheric carbon | decaying plants and animal,the growth of trees
🗑
|
||||
| carbon cycle refers to | movement of carbon through living organisms, the atmosphere, the sea, and the earth
🗑
|
||||
| characteristics pertain to the problem of global warming | possible consequences include altered climate and increased sea level,increased skin cancer incidence and damage to radiation sensitive species has been observed
🗑
|
||||
| identify the single most effective strategy to reduce carbon dioxide emissions | develop alternate energy sources that do not rely on fossil fuels
🗑
|
||||
| what country has the highest per capita emission of carbon dioxide | united states
🗑
|
||||
| what practices might be described as carbon sequestration | pumping carbon dioxide deep into ocean,increasing combustion of fossil fuels
🗑
|
||||
| process plays the most important role in the greenhouse effect | energy from the sun is absorbed by the atmosphere
🗑
|
||||
| what explanation accounts for the fact that on average cloudy nights are warmer than clear nights | clouds are composed of water vapor and H2O is a strong greenhouse gas
🗑
|
||||
| the greenhouse effect refers to the process by which | greenhouse gases absorb ultraviolet radiation from the sun, warming the molecules
🗑
|
||||
| chloroflurocarbons rise to the strosphere and | after intereacting with uv energy, become free radicals which destroy ozone
🗑
|
||||
| one isotope for a particular element is distinguished from another by the number of | neutrons
🗑
|
||||
| free radicals are | species with unpaired electrons
🗑
|
||||
| frequency is | number of waves passing a fixed point in one second
🗑
|
||||
| what electron accounts for many of the chemical and physical properties | outermost
🗑
|
||||
| single bonds, double bonds, and triple bonds | have 2,4,6, shared electrons
🗑
|
||||
| light behaves like | wave and a particle
🗑
|
||||
| HFCs may be used to replace CFCs, which coupound is a HFC | CH2F2
🗑
|
||||
| the wavelength of light in the xray region of the electromagnetic spectrum is | about the size of a bacterial cell and virus
🗑
|
||||
| when one pair os shared electrons is involved in a covalent bond, the linkage is called | single bond
🗑
|
||||
| the atomic number is | number off protons in a nucleus
🗑
|
||||
| the periodicity of the properties of elements is cheifly due to the | ___
🗑
|
||||
| elements iin the same colum of the periodic table have what in common | valence electrons
🗑
|
||||
| isotopes of an element have the same number of | protons, but different numbers of neutrons
🗑
|
||||
| speed of light in air | does not depend on wavelength or frequency
🗑
|
||||
| wavelength | distance between successive peaks of waves in the electromagnetic spectrum
🗑
|
||||
| structure of ozone most closely resembles a | bent molecule with the same length of chemical bonds
🗑
|
||||
| O2 and O3 molecules are | allotropes
🗑
|
||||
| which color in the rainbow has the shortest wavelength | blue
🗑
|
||||
| what forms by cmonining an oxygen atom with an oxygen molecule | ozone
🗑
|
||||
| what is the most energetic of the three forms of Uv light | UV-C
🗑
|
||||
| what is the unit for concentration of ).00004% | pph
🗑
|
||||
| choose the name of the compund formed by combining potassium (K) with iodine (I) | potassium iodide
🗑
|
||||
| what is the compound formed by combining carbon with oxygen | carbon dioxide
🗑
|
||||
| green chemistry is | the design of products and processes that reduce hazardous substances
🗑
|
||||
| pure substance | an element of a compound
🗑
|
||||
| compound | element of a compound made up of two or more
🗑
|
||||
| mixture | physical combinations of two or more substances present in variable amounts
🗑
|
||||
| if representative element "X" reacts with representative element "P" the result is | XP
🗑
|
||||
| what process does not involve a chemical change | bioling water
🗑
|
||||
| matter | anything that has mass and occupies space
🗑
|
||||
| elements consist of 3 categories | metals, non metals, transition
🗑
|
||||
| metals | elements that are shiny and conduct electricity and heat
🗑
|
||||
| nonmetals | elements that cannot be cast into shapes have varied apperances and do not conduct well
🗑
|
||||
| metaloids | 8 elements sometimes called sentimetals, B,SI,GE,AS,SB,TE,Po,At
🗑
|
||||
| noble gases | group 8a.elements that are inert and do not readily undergo chemical reactions.
🗑
|
||||
| atoms | what all matter is composed of super small particles smallest unit of an element that can exist as a stable, independent entity
🗑
|
||||
| molecule | fixed number of atoms held together by chemical bonds in certain spatial arrangement
🗑
|
||||
| electrons | neg charge and is on the outer shell
🗑
|
||||
| protons | positive charge
🗑
|
||||
| neutrons | no charge
🗑
|
||||
| where is the nucleus | center of atom
🗑
|
||||
| combustion | rapid combustion of oxygen with a substance
🗑
|
||||
| chemical reaction | process wherby substances describes as reactants are transformed into different substances called products
🗑
|
||||
| law of conservation of mass and matter | mass is neither created nor destroyed in new substance.
🗑
|
||||
| cataylyst | chemical substance that participates in a chemical reaction and influences its speed with undergoing permanent change
🗑
|
||||
| allotropes | two or more forms of the same element that differ in their chemical structure and therefore in their properties
🗑
|
||||
| atomic number | number of protons in an atom of that element. example: H contains 1 proton,=atomic mass of 1
🗑
|
||||
| covalent bonds | a chemical nond in which two electons are shared by the atom involved
🗑
|
||||
| atoms | elements are made of
🗑
|
||||
| mono means | 1
🗑
|
||||
| di or bi | 2
🗑
|
||||
| tri | 3
🗑
|
||||
| tetra | 4
🗑
|
||||
| penta | 5
🗑
|
||||
| hexa | 6
🗑
|
||||
| hepta | 7
🗑
|
||||
| octa | 8
🗑
|
||||
| nona | 9
🗑
|
||||
| deca | 10
🗑
|
||||
| nitrogen monoxide chemical formula | NO
🗑
|
||||
| nitrogen dioxide | NO2
🗑
|
||||
| hydrocarbsons | compounds of hydrogen and carbon- and can have more than 4 carbon atoms,also called organic compound
🗑
|
||||
| single covalent bond | formed when only one pair of shared electrons forms the linkage bewteen atoms
🗑
|
||||
| octet rulei | fact that electron in many molecules are arranged so that every atom except hydrogen) shares 8 electrons
🗑
|
||||
| polyatomic molecule | consists of 3 or more atoms
🗑
|
||||
| triple bond | is a covalent linkage made up of 3 pairs of shared electrons, short, hard and strong to break.
🗑
|
||||
| % to ppm | 4 decimal places to right
🗑
|
||||
| ppm to % | 4 places to left
🗑
|
||||
| percent by mass or composition | figure each elements molar mass. massof element divided by mass of compound x 100%
🗑
|
||||
| avagadros # | = to 1 mole 6>02 X 10^23 of anything usually molecules to atoms
🗑
|
||||
| molecular weight= | how many moles
🗑
|
||||
| grams to moles you | divide, start with grams
🗑
|
||||
| moles to grams you | multiply start with moles
🗑
|
||||
| infared spectroscopy can determine unknow molecules | _
🗑
|
||||
| periodic properties | elements are sequenced in order of increasing atomic number, they have similar chemical propterits fall in the same columns
🗑
|
||||
| outer valence electrons | found in the highest energy level and help to account for many of the observed trends in chemical properties
🗑
|
||||
| lewis structure | representation of an atom or molecule that shows its outer electrons
🗑
|
||||
| halons | compunds in which BR and F atoms replace some or all of the clorine atoms
🗑
|
||||
| tetrahedron | four corneded figure with four equal triangular sides
🗑
|
||||
| wavenumber= | 10,000 divided by wavelenght
🗑
|
||||
| diatomics gases | N2 and O2
🗑
|
||||
| quantized | electronic,vibrational,and rotational energy means only certain energy levels are permitted
🗑
|
||||
| anaerobic bacteria | those that can function without the use of molecular oxygen, produce methane
🗑
|
||||
| albedo | ration of electromagnetic radiation relflected relative to the amount of radiation incident on the surface:is a measure of relectivity of a surface
🗑
|
||||
| what subtomic particles surround the nucleus | electrons orbit in shells
🗑
|
||||
| what does the number of electron in an elements outermost orbital (compared with the toal number possible) determines | its chemical properties and reactivity
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Created by:
bisonlea