Lecture 2 Flashcards
Matter
Matter is made up of atoms.
Everything is made up of matter.
Proton
Positive charge
1 mass unit
Neutron
Neutral
1 mass unit
Electron
Negative charge
such a low mass we say its 0 mass.
Atomic Number
= the number of protons
The Charge of an Atom
example:
Protons=2, Neutrons= 4, Electrons=6
the charge is negative because there are more electrons (-) than protons (+).
Mass of the atom
protons =2, neutrons =4, electrons=6
P+N=mass
mass for this example is 6
Activation Energy
amount of energy required to start a reaction.
Enzymes
-lower the activation energy required to perform a reaction
enzymes can be used over and over again without being changed or used up.
“Think Key/Door example”
Inorganic Compounds
no primary carbon Most Important inorganic compounds in the body -Water -Carbon Dioxide -Inorganic acids, bases, salts
Organic Compounds
primary carbon
Water Chemical Properties
Solubility -molecules dissolve in water Reactivity -chemical reactions take place in water High Heat Capacity -takes a lot of energy to raise temperature Lubrication -Effects lubricant due to low friction between molecules
Solute
Molecules dissolved in water.
example: making a cup of hot coco. the powder and the marsh mellows would be the solute.
Solvent
liquid that dissolve the molecules.
example: making a cup of coco. the water or the milk is the solvent.
Hydrogen Ions
(H+) are extremely reactive
can break bonds and cause damage
