Lecture 1 - Basic Chemistry and Water Flashcards
6 Qualities of living things
- organization
- energy utilization
- internal constancy
-grow,develop reproduce
-react to environment
-evolution
What is the smallest unit of life
Atom
What is an isotope?
element with same number of protons but different number of neutrons
elements that make up 96% of life
Carbon, Oxygen, Hydrogen, Nitrogen
What is a covalent bond?
2 elements share an electron
What is an ionic bond
more electronegative atom strips electron from other element
dipole-induced-dipole
when a dipole causes a nonpolar atom to act polar
8 properties of water
-cohesive
-high surface tension
-high specific heat
-high heat of evaporation
-high heat of freezing
-less dense at solid than liquid
-excellent solvent
-dissociate to create pH
what is a buffer usually composed of
weak acid + corresponding base
3 types of non-covalent bonds
- ionic
-hydrogen
-van der waals forces
water dissociates to form what
OH- & H3O+
what is high specific heat
the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree
