click below
click below
Normal Size Small Size show me how
Bio 114
Mastering Biology
Term | Definition |
---|---|
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 |