Exam Review Flashcards
What is matter?
Anything that takes up space and has mass
What are the 3 subatomic particles and their charges?
Proton (+)
Neutron 0
Electron (-)
What is an atom?
Particles so small they are indivisible
What is a molecule?
Chemical particles composed of 2 or more atoms
What are the 3 electron shells?
1 -> 2
2 -> 8
3 -> 18
How do you calculate the weight of a molecule?
Sum of atomic weights
What is a mole?
Equivalent to avagadros number, periodic table atomic mass is in grams per mol
What 3 elements make up most of the human body?
Oxygen, carbon, and hydrogen
What is an ion?
Charged particle with unequal number of protons and electrons
What is a cation?
Positive charge
What is an anion?
Negative charge
What is an isotope?
Differ in number of neurons the atom contains
What is free radical?
Odd number of electrons that want to become stable
What is an electrolyte?
Salts that ionize water
What are the 3 atomic bonds?
Covalent, ionic, and hydrogen
What is a covalent bond?
Forms by sharing electrons
What is an ionic bond?
Attraction of cation to anion
What is a hydrogen bond?
Weak attractive between slightly positive hydrogen and slightly negative oxygen
What is a polar covalent bond?
Electrons shared unequally
What is a Nonpolar covalent bond?
Electrons shared equally
What are the 7 properties of water?
Polarity, solvency, adhesion, cohesion, surface tension, thermal stability, and chemical reactivity
What is polarity?
Properties of water that support life
What is solvency?
Ability to dissolve other chemicals
What is adhesion?
Tendency to cling substances together
What is cohesion?
Tendency of a substance to cling to itself
What is surface tension?
Surface film on water
What is thermal stability?
Takes a lot of heat to change phases
What is chemical reactivity?
Able to ionize other substances to become ionized
What does hydrophobic mean?
Doesn’t like water
What does hydrophilic mean?
Like water
What does ampiphillic mean?
Both hydrophobic and hydrophilic parts
What’s the difference between a calorie and a Calorie?
calorie- heat needed to raise 1 g of water 1 degree Celsius
Calorie- 1000 calories
What is suspension?
Has large particles mixed in a solvent
Ex: blood cells in blood plasma
What is a colloid?
A mixture of larger particles in a solvent
Ex: albumin in plasma
What is a solution?
Solute mixed with a solvent
What is a solute?
Substances that dissolve
What is a solvent?
Substances that does the dissolving
What is an acid?
A proton donor
What is a base?
A proton acceptor
What happens when an acid and base are mixed?
Neutralized substance
What is the pH of water?
7 (neutral)
What is the pH of blood?
7.35-7.45 (basic)
What is a buffer?
Resist changes in pH
What are the 3 chemical reactions?
Decomposition
Synthesis
Exchange
What is an organic compound?
Compounds containing carbon
What are the 4 organic compounds?
Carbs, lipids, proteins, nucleic acids
What are foods composed of carbs?
Sugars and starches
What are elements in carbs?
Carbon, hydrogen, and oxygen
What’s a monosaccharides generic formula?
C6H12O6 (glucose)
What are fatty acids?
Chain of 24 carbon atoms with a carboxyl and methyl group at the ends
What is a saturated fatty acid?
Maximum amount of hydrogens
What is an unsaturated fatty acid?
Has double bonds
What is a triglyceride?
3 fatty acids bonded to a glycerol
What is a steroid?
Lipid with carbon atoms arranged in 4 rings
Whah molecules does the body use to make steroid hormones?
Cholesterol