Flashcards in Unit 2: Chemistry of Life 2 Deck (31):
Energy comes from the rapid movement of _______ normally, but it could be ______ too.
E represents _______
Energy of position. (Usually refers to electrons “locked” in a chemical bond.)
Potential Energy (PE)
Energy of movement. (Usually refers to electrons that can move freely.)
Kinetic Energy (KE)
An element’s or molecule’s properties are usually associated with the number of _______ it has.
Run horizontally on the Periodic Table.
Elements behave _________ as you go across a period.
Elements behave ________ as you go down a column or family.
Run vertically on the Periodic Table
Columns or families
These occur between elements or molecules.
This type is the strongest type of chemical bond.
Results from sharing electrons between elements or molecules to fill both outer shells.
They always create a molecule. (The size of the molecule may differ though.)
__________ molecules carry an electrical charge at opposite poles
__________ molecules do not have an electrical charge.
Used to show the shape of the molecule
Tells the elements, and number of atoms of each, that make up a molecule
Molecular Formula (Chemical Formula)
These are fairly strong bonds while dry – but are weak in water so they dissolve into ions.
These bonds are created by gaining or losing electrons between elements so that each element can fill its’ outer most shell.
possess a positive charge because it has more protons than electrons.
possess a negative charge because it has more electrons than protons.
A cation bonded to an anion to make a salt when dry.
Fairly weak bonds. (It is “like” a magnet) (A positive Hydrogen attracted to a negative “Substance”…usually oxygen.)
These are the most important biological bonds.
To ______ a bond requires energy to be consumed. (The bond requires “catching” an electron.)
To ______ a bond gives off energy. (The electrons are “released” to move again.)
Located on the left side of an equation.
Located on the right side of an equation.
Matter is neither created nor destroyed just transferred or transformed
Law of the Conservation of Mass
If an ________ is on one side of an equation it must be on the other side too