MODULES 2 AND 3 Flashcards
hypothesis
a casual explanation for an observation or phenomenon ; testable
testable hypothesis
an experiment can be designed to test wether it is true or false
polar covalent bonding
when two atoms bond by the equal sharing of electrons
ionic bonding
a chemical connection formed when one atom completely looses its electrons to another
non polar covalent bonding
when two atoms of different electronegativities bond through an unequal sharing of electrons
the atomic number tells you
how many protons and electrons in an atom
the atomic mass tells you
sum of protons and neutrons
formula for the amount of neutrons
atomic mass - atomic number
first electron shell holds
2 electrons
the second electron shell is the
valance shell, holding valance electrons (the ones shared in bonding)
adjacent water molecules are connected by the electrical connection between
the hydrogen of a water molecule and the oxygen of another water molecule
cohesion
water molecule bonds to water molecule
adhesion
water molecule bonds to different type (unlike) molecule (ex. water or plastic)
hydrophilic molecules
ions and polar molecules, water loving
hydrophobic molecules
uncharged and non polar molecules, water hating
water has a high…
high specific heat and high heat of vaporization
molecules are formed when
atoms bond to each other
double bonds involve
4 electrons
