Chp 4 gen chem DAT Flashcards
what Is a group
its the columns on the periodic table - elements in the column have similar properties
what is a period
its the rows in the periodic table - they don’t necessary have similar properties
what group is 1
alkali metals
-low ionization (they are easy to take e- because they want to get rid of the outer most e-)
-very reactive with water
- M(s)+h2o(l)->MOH(aq)+1/2H2(g)
h2o gets reduced to a gas , very exothermic
what is group 2
alkaline metals
-low ionization
-react with hate but not as strongly
what group is 7
halogens
-high electronegativity
-hight electric affinity
-only 1 e- away from octet
-highly reactive with metals
-very good oxidizing agents
what is group8 ?
noble gasses
inert gases (unreceptive) they have a full octet
transition metals
d block
they can have many oxidation states
which group is 6 ?
oxygen group
two forms of O ( o2 and o3)
very good oxidizing agents
what is atomic radius ?
the distance between its nuclei to the outer most orbitals
what is bond length ?
when two atoms bond - the distance between their nuclei
to find bond length
if same atom just X2
diff atom add the distances
atoms size get smaller…
as you go UP and RIGHT
atoms get larger ….
as you go DOWN and LEFT
atoms size is similar to ion sizes
if we add electron to atom its will get larger
+= sub e
-=add e
isoelectronic series
diff elements with diff changes equal same number of electrons
