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Chap 2

Bio quiz

QuestionAnswer
element made up of one type of atom examples- cabon, oxygen, nitrogen, zinc, iron
atom smallest unit of matter retaining the properties of the element
subatomical particles smaller then atoms
proton mass 1+ charge
neutron mass 1 - charge
electron no mass-1 charge
atomic number is the # of protons an atom contains(determines the atom)
How many naturaly occuring elements 92
what is atomic weight protons plus neutrons
isotopes atom of an element with a different number of neutrons(also different atomic weight)
uses for isotopes power production, medicine( both diagnosis & treatment), dating fossils, sterization
half life the time for one half of the isotope to "decay"
molecules 2 or more atoms bonded together
compounds 2 or more atoms from different elements bonded together
electrons determine bonding between atoms. Atoms ant to be stable which requires the right # of electrons
what is stable 2 electrons in the first shell and 8 in the outer one
ionic bond forms when there is a complet transfer of one or more electrons
ion a charged particle
covalent bond the electrons are shared
hydrogen bond involves hydrogen atoms, forms a weak bond; the reason water molecules stick together
acid a substance with free hydrogen ions(H+) in it
base a substance with free hydroxyl ion(OH-) in it
acid presipitation rain or snow, can damage eco system. Coms from water combining with sulfur & nitrous oxidies released in burning fossil fuels
what is the range on Ph scale 0 to 14 0 very acidic 14 very basic 7 neutral
acidic household cleaners with high acid lemon juice, grape fruit juice, soft drinks, vinegar, beer, tomatoe juice
Base household cleaners with Oven cleaner, bleach, ammonia, milk of mag
Oxygen O
Carbon C
Hydrogen H
Nitrogen N
Calcium Ca
Phosphorus P
Potassium K
Sulfur S
Sodium Na
Chlorine Cl
Magnesium Mg
Created by: 1047936947
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