chem final Flashcards
to convert from one resonance structure to another, _
only electrons can be moved
elements _ exhibit similar physical and chemical properties
in the same group on the periodic table
group periodic table
vertical and down (same physical and chemical properties)
periods periodic table
across and horizontal and left to right
the gold foil experiment performed in Rutherford’s lab _
led to the discovery of the atomic nucleus
valence electron
the number of electrons on the outermost shell of an atom
how do u find valence electrons?
the number at the top row
alkali metals
group 1 metals
1 valence electron
highly reactive
soft (like butter)
low melting points
shiny
alkaline earth metals
group 2 metals
2 valence electrons
very reactive but less than alkali metals
harder than alkali metals
higher melting point than alkali metals
metal luster shiny
halogens
group 17
7 valence electrons
highly reactive
very colorful
transition metals
group 3-12
vary in everything
valence electrons based on orbitals
noble gasses
group 18
complete valence shell
highly stable
very unreactive
colorless, odorless, tasteless
low boiling and melting point
nonflammable
metalloids
on the line thing
between metals and non metals
metallic luster but brittle
moderate electrical conductivity
low thermal conductivity
nonmetals
right of metalloid line
metals
left of metalloid line
metalloid line
dividing line between metals and nonmetals
electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p6
ionic
metal + non metal
covalent
nonmetal + nonmetal
anion
negative charge (right)
cation
positive charge (left)
how do u find number of electrons
atomic number (bottom left)
how do u find mass number
protons + neutrons (top left)
how do u find number of protons
atomic number (bottom left)