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Bio 114

Mastering Biology

matter can't be broken down to other substances by chemical reaction
elements substances that are made up of one atom ,
organism are composed of matter
neutron 0 charge
proton +1 charge
made up of elements matter
matter anything that takes up space
compound substances consisting of 2 or more different elements combined in a fix ratio
electron -1 charge
innermost electron shell can hold up to 2 electrons
uncharged atom number of protons is equal to the number of electrons
number of electrons in the outer most shells determines the type of chemical reaction that an atom particpates in
isotopes atom atoms w same atomic number but different atomic mass
if you change the number of protons it would change an atom into a different element
covalent type of bond joining the two hydrogen atoms
molecule two or more atoms help together by covalent bonds
water molecule joined to 4 other water molecules by hydrogen bonds
natural elements 92
elements Carbon, Nitrogen , Oxygen, Sulfur , Phosphorus, Hydrogen
Created by: ASIA17