Chapter 2 Flashcards
Matter
anything that contains mass
Elements
cannot be broken down chemically into smaller parts
Compound
contains 2 or more elements
What are the four elements of life?
Carbon, Oxygen, Nitrogen, and Hydrogen
Mass Number is equivalent to what?
protons + neutrons
What is a covalent bond?
forms between atoms when electrons are shared
Regarding bonding what is unique about molecules?
2 or more covalently bonded atoms
What does it mean for a bond to be polar covalent?
atoms have different electronegativity and therefore the electrons are pulled closer to one atom
What is an ion?
the result of an atom gaining or loosing an electron
What is a cation?
an atoms with more protons than electrons
What is an anion?
an atom with more electrons than protons
What is an ionic bond?
An attraction between oppositely charged atoms
What is a hydrogen bond?
a weak attractive bond between hydrogen bonds
What are van Der Waals interactions?
weak attractions between molecules to parts of molecules that result from transient local partial charges
When is chemical equilibrium reached?
when the forward and reverse reaction rates are equal
