chemistry
No description yet. This curated deck is ready for daily study.
Card preview (12)
relative atomic mass
The average mass of the isotopes of an atom of an element compared with 1/12th of the mass of a carbon-12 atom.
across the period
C- charge increases ( more protons) A- attraction increases R- radius decreases S- shell stays the same
down the group
C- charge increases A- attraction decreases R- radius increases S- increase ( extra shell)
what is the first term of ionisation energy
energy required to remove 1 mole of electrons from one mole of a gaseous +1 ions
electron efficiency
energy released when one mole of gaseous atoms gain one mole of electrons to form one mole of gaseous 1- ions
en example of a first and second electron affinity
O (g) + e~ ——> O~ (g) O~(g) + e- ——> 02 (g)
electronegativity across a period
c increase a increase r decrease s same
electronegativity down a group
c- increase a- decreases r- increase s - increase
redox calculation
combined with H- +1 combine with O- (-2) combined with F - (-1) combined with Cl (-1)
what type of forces are Van Der Vol
van der vol forces non polar force of attraction (same elements)
what type of bonding do polar have different elements
polar- have dipole + hydrogen bonding force of attraction. weak forces
electron configuration.
1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d 7p. s-2 p-6 d-10