Intro to Chem Flashcards
label the following as atom, element, molecule or compound:
- N
atom & element
label the following as atom, element, molecule or compound:
- N^2
molecule & element
label the following as atom, element, molecule or compound:
- N2O
- molecule & compound
what is the energy between like charged particles
repel
what is the energy between opposite charged particles
attract
what is Coulomb’s law
notes
what is a the role of a catalyst
speeds up reaction and doesn’t get reconsumed
what endothermic
absorbs energy from surroundings
what is Avogadro’s number
6.022 * 10^23 = 1 mol = mass in g
what is one atomic mass unit relative to Carbon
C/12
what charges identify an element
protons
what is nuclear force
where similar charged atoms stick together over small distances rather than repelling each other e.g. beryllium
what are valence electrons
those on the outer shell
what group doesn’t lose electrons easily
metals (excluding H)
what is an ion
a charged atom
what is a cation
+ve ion
what is an anion
-ve ion
how do ionic bonds form
electrons trying to lower potential energy
are ionic bonds shared
no, electrons are taken from the metal by the non metal because the metal wants to go to lower energy
how do we see electronegativity on the periodic table
incr. from left to right
what is ionisation energy
amount of energy to remove an electron
what is electronegative energy
energy for an electron to bond
what is the formula for mass in terms of moles
m = nM
where m = mass, n = number of mole, M = molar mass
what is the formula for moles in terms of volume
n = cV
where V = volume, c = concentration
