periodic table Flashcards
name all the blocks
left-s block
middle-d block
right-p block
bottom- f block
what are the elements in group 18 called
noble gasses
what law says that the properties of the elements are a regular function of its atomic numbers
periodic law
the first series of inner transition elements
lanthanide series
what family is made up of the tightly held elements
halogen
the pattern of elements from row to row is
periodicity
atomic number 90 to 103 makes up the
actinides
who found the law of octaves
newlands
what metals are group 1 and 2
alkali
what are valence electrons
2nd number in group number
group 13
aluminum family
group 14
carbon family
group 15
pnictogen family
group 16
oxygen family
group 17
halogens (MOST REACTIVE GROUP)
how much is an octet
8
group 18
noble gases (EXTREMELY LOW REACTIVITY)
what is the most common element in the universe
hydrogen
how many electrons in groups 3-12 and what are these groups called
2, transitional metals
what are the inner transitional metal series
lanthanide series and actinide series
what is atomic radius
size of an atom
how does atomic radius change going across a period
decreases
how does atomic radius change going down a group
increases
describe justification
this element has a smaller/larger atomic radius because it s nuclear charge is more/less than this element. Less nuclear charge=less tightly the electrons are packed=larger size
describe justification for going down
this element has more/less electron shielding because its in this shell
who produced the first 63 elements and periodic law
mendeleev
