General Knowledge Flashcards
metal oxides
bases
non-metal oxides
acids
does atomic radii increase or decrease as you go across the period?
decrease - because there are the same shells of electrons but more protons, so attraction increases
does atomic radii increase or decrease as you go down a group?
increase - because there are new shells and more repulsion so bigger
what is ENC
attraction felt by the valence electrons
each inner electron ‘blocks’ a proton
define electronegativity
the attraction of an atom to a shared pair of electrons
define first ionization energy
the energy required to remove one mole of electrons from one mole of gaseous atoms
does FIE increase or decrease down the group?
decreases because there is more shells between the valence electrons and nucleus, so easier to remove
does FIE increase or decrease across the period?
increase, because number of protons increase while the shells are the same, so harder to remove
define electron affinity
the energy change when one mole of electrons are added to one mole of gaseous atoms
five processes in mass spectrometry
vaporization, ionisation, acceleration, deflection, detection
define relative atomic mass
the average mass of an atom compared to the mass of 1/12th of a carbon-12 atom
define compound
consist of atoms of different elements, chemically bounded in the fixed ratio
define molecules
atoms of the same elements, chemically bounded
define element
primary constituents of matter, which cannot be chemically broken down into simpler substances
