first nine wks test Flashcards
how do you tell what the # of neutrons is
atomic weight minus atomic number
AW-A#
what are independent variables and dependent variable
independent- the variable that is changed or manipulated
dependent- result of what was changed
what is D.R.Y
what is M.I.X
D.ependent R.esult Y.-axis
M.anipulated I.ndependent X.-axis
are protons positive or negative?
positive
true or false?
metals are NOT good conductors of electricity
false!
what does inert mean?
non-reactive
are electrons positive or negative?
negative
what is an atomic number?
number of protons
true or false?
noble gases ARE stable
true!
are noble gases considered stable?
yes
what is the rule for the Bohr Model?
2,8,8
first energy level- 2 electrons
second energy level- 8 electrons
third energy level- 8 electrons
neutrons are….¿
neutral
what are valence electrons?
electrons found in the last energy level
true or false?
valence electrons are electrons involved in bonding
true!
are hydrogen ions more acidic or more basic?
more acidic
true or false?
noble gases are inert
true!
are metals positive or negative?
positive
what is an oxidation #?
of electrons either given away or received
what is adhesion?
H2O sticking to other objects
what is a covalent bond?
chemical bond formed when two atoms share electrons
are hydroxide ions more acidic or basic?
more basic (alkaline)
what is cohesion?
H2O sticking to other H2O
what does malleable mean?
bendable
