Periodic table and electron configuration Flashcards
period 2 what group?
alkaline earth metals
what group is in the period 1?
alkali metal
last group at the very bottom
actinides
Dmitri Mendeleev and Lothar Meyer
both lived and did not know each other but they had the same idea
- left blanks for the elements that is yet to be discovered
- increasing atomic mass
- sets of 8
the characteristics that is common in all elements is
atomic number
group 1 and 2, and 1-14 (the taller ones) are called-
representative elements
can be found above metalloids
non metals
characteristic are opposite to metals
non metals
period is in what position
column = vertical
inner transition elements
actinides and lanthanides are still part of transition elements
Henry moseley
- modern periodic table
- order of atomic number
- based on the frequencies of x ray emitted by the elements
—- share both qualities that is present within metals and non metals
metalloid
period 17 what group?
halogens
how many groups in total?
7
lanthanides and actinides belong in what group
6 and 7
2nd to the last group
lanthanides
group = other name
family
the group between metals and non metals
matalloids
period 18 what group?
noble gases
periodic law
elements are arranged based on increasing
John Newlands
increasing atomic mass
Similar characteristics
law of octaves (8 columns)
other name of metalloids
semi conductors
13-16 group
boron, carbon, nitrogen etc. group
Johann Dobereiner
formed 3 triads: similar chemical properties
