Atoms
Anything that takes up space and has mass
Matter
two atoms bonded together
molecule
Water makes up about ____ of our total body weight
70%
Organic molecules
substances that produce hydrogen ions
Acids
basic building blocks of matter that cannot be broken down
Elements
molecules made of different atoms (ex. H2O)
compound
Because electrons spend more time around oxygen than hydrogen, this molecule develops partial positive and negative charges.
polar molecule
Polysaccharides are an example of a complex _______
carbohydrate
substances that take up hydrogen atoms
Base
the atomic number is equal to the number of _____
protons
Atoms are most stable when their outer ________ is full
valence shell or electron shell
Attraction between a slightly positive hydrogen and a slightly negative oxygen
Hydrogen Bond
Lipids do not dissolve in water because they are _______
hydrophobic
ranges from 0-14
pH scale
sum of the protons and neutrons
mass number
This type of bond forms when one atom donates electrons to another, creating positively and negatively charged ions that attract each other.
Ionic Bond
This property of water helps prevent large temperature changes in the body because water can absorb a lot of heat.
High heat capacity
Fatty acid that has no double covalent bonds between the Cs
Saturated FAs
A pH below 7 is acidic. This means there are a lot of ______ ions
hydrogen
orbit around the nucleus in shells
electrons
This type of bond forms when atoms share electrons so each atom can fill its valence shell.
Covalent Bond
This property of water allows water molecules to stick to other surfaces.
Adhesion
structure that gives protein its function
A solution that resists changes in pH when acids or bases are added to it
Buffer