more for unit 1 test Flashcards
atomic radius periodic trend
increases going down
decreases L->R
what represents an electron config corresponding to valence electrons in an element where there is a large jumó between the 2nd and 3rd e
ns2
Elemental analysis helps determine
Formula units of each compound by calculating mole ratio which is the form u of the compound
If asked ab a photoelectron spectra and why an atom is beside another consider..
The nuclear charge
lowest whole # ratio of atoms
empirical formula
actual # of atoms
chem or molecular formula
percent composition
múltiple # of atoms by atomic mass
sum results to find total mass
divide mass of each element by total mass and multiply by 100
2.4 g sample of mixture of CaCl & NaCl contains .12 g of Na what percent of this sample is NaCl
1) determine mol of Na(g in sample/ molar mass Na)
2)use mol of Na to determine mol of NaCl
3)use mol of NaCl to determine mass of NaCl
calculate % NaCl in sample use percent comp
mol of NaCl/ 2.4 g sample
ionization energy and other shit
trend?
increases L=> R and decreases top to bottom
atomic radius
trend?
decreases L->R increases top-> bottom
cations
positive smaller than parent atoms
anions
negative bigger than parent atoms
how to find protons electrons and neutrons on periodic table
atomic number = protons & electrons
neutrons = mass - atomic #
periodic table labels
of VE
and ion charges for each column(family, group)
1-8 skipping transition metals for VE
+1, +2 _______________ +3, 0, -3, -2,-1
each row in periodic table represents
shell or ring
