Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Campbell Bio 8th Ch2
The Chemical Context of Life
| Question | Answer |
|---|---|
| element | substance that cannot be broken down into other substances by chemical reactions |
| matter | anything that takes up space and has mass |
| compound | substance consisting of two or more differentelements combined in a fixed ratio. |
| trace elements | are those required by an organism in only minute quantities. |
| atomic nucleus | where protons and neutrons are, in the center of the atom |
| dalton | measurement for atoms and subatomic particles |
| atom | smallest unit of matter that still retains the properties of an element. |
| atomic number | number of protons, unique to each element |
| mass number | sum of neutrons and protons |
| atomic mass | measured in daltons |
| energy | capacity to cause change/do work |
| potential energy | energy matter possesses because of its location or structure |
| electron shells | where electrons are. have more energy in the 2nd and even more in the 3rd |
| valence electrons | outer electrons |
| valence shells | the outermost electron shell |
| orbital | space where an electron is found |
| chemical bonds | atomic bonds, attractions |
| covalent bond | sharing a pair of valence electrons by two atoms. |
| molecule | two or more atom held together by a covalent bond |
| single bond | a pair of shared electrons |
| structural formula | shows atoms and bonds H-H |
| molecular formula | H subscript 2 |
| valence | bonding capacity- how much electons a atom can share, gotta complete valence shell |
| nonpolar covalent bond | bond where electrons are shared equally |
| electronegativity | attraction of a particular atom for the electrons of a covalent bond |
| polar covalent bond | electrons not shared equal |
| ion | charged atom or molecule |
| cation | charge of the ion is positive |
| anion | charge of ion is negative |
| ionic bond | opposites attract= cation and anion attract |
| ionic compounds/salts | compounds that form ionic bonds |
| hydrogen bond | Hydrogen atom covalently bonded to one electronegative atom and another electonegative atom |
| van der Waals interactions | weak and occur onlywhen atoms and molecules are close together. FunFact: Cause Geckos to walk upwalls....wierdness |
| chemical equillibrium | the point at which the reactions ofset one another |
Created by:
Megan Fitz
Popular Biology sets