Chemistry- chapter 6

what did Newlands find in 1864

that properties of elements repeat every 8th element

what was Newlands finding named

the law of octaves

why was Newlands’ findings not accepted

they weren’t seen as professional because of the music analogy

what did Mendeleev form in 1869

the first periodic table

where was Mendeleev from

russia

where was Meyer from

germany

what was unique about the first periodic table

it had blank spots left for new elements

what did Mendeleev do with the undiscovered elements

predicted their properties

why was Mendeleev’s table used more than Meyer’s

Mendeleev posted his results first

what was wrong with mendeleevs table

it was sorted by atomic mass

who corrected Mendeleev’s mistakes in 1913

Henry Mosley

what was Mosley’s revision

arranging the elements by atomic number instead of mass

what does periodic mean

repetition in a specific manner

what is the row called

a period

what do periods sort elements by

energy levels

what is the columns called

groups or families

what do groups sort elements by

similar properties and by valence electrons

how many groups

18

how many periods

7

what are the group one elements called

alkali metals

what are the group two elements called

alkali earth metals

what are the groups 3-12 elements called

transition metals

what are group 16 elements called

chalcogens

what are group 17 elements called

halogens

what are group 18 elements called

noble gasses

what one element is in group one but not apart of the alkali metals

hydrogen

what are the bottom two rows called

inner transition metals

what is the first row at the bottom called

lanthanoid

what is the second row at the bottom called

actinoid

what elements border the stair step

metalloids

what element borders the stair step but isn’t a metalloid

aluminum

name three properties of metals

malleable, has luster, and is a good conductor

name three properties of nonmetals

brittle, insulators, is dull

do metals lose or gain electrons

lose

do nonmetals lose or gain electrons

gain

what is the most active metal

francium

what is the most active nonmetal

fluorine

what are alkali metals

the most active metal group

what is the most active nonmetal group

halogens

what is the octet rule

an atom that has 8 valence electrons will be considered full and stable

what is special stability

an atom with a full or half full sub level is more stable

what does special stability apply to

d and f sublevels

what are the elements on the right side of the stair step

nonmetals

what year did newlands discover the law

1864

what year did the first periodic table get made

1869

what year did Mosley revise the periodic table

1913