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PBHS Chem 1 Ch 6.1

chapter 6.1 organizing elements on the periodic table

QuestionAnswer
1829 German chemist named ________ organized elements into a table J.W. Dobereiner
group of three elements with similar properties triad
example triad chlorine, bromine, iodine
1869 Russian chemist _____________ published a table of elements Dmitri Mendeleev
published later in the same year that Mendeleev published his table; this German chemist receives little notice for his work Lothar Meyer
Mendeleev arranged the elements in his table in order of __________ increasing atomic mass
Mendeleev left gaps in his table, predicting that ________ & ________ would be discovered to fill them gallium & germanium
1913, this British chemist ___________ recognized that Mendeleev had a few elements out of order and reordered the elements based on their _____________ Henry Moseley, increasing atomic number
on the Periodic Table, rows are called periods
on the Periodic Table, columns are called groups
each period corresponds to a _________ principal energy level
period 1 corresponds to the _____ energy level first or 1s
period 2 corresponds to the ______ energy level second or 2s & 2p
the elements within a column or group have simlar properties. This pattern of properties repeats as you move from one period to the next. This is called the _______________. periodic law
80% of the elements on the periodic table are classified as ____ metals
metals are good __________ of heat and electricity conductors
all of the metals are _______ except for ________ which is a ______________ solids, mercury, liquid
to the upper right of the periodic table are found the _____________ non-metals
many of the non-metals are _________, with the exception of ________ which is a liquid gases, bromine
elements found on either side of the stair-step line are called ___________ metalloids
metalloids have properties of both __________ and ____________ metals & non-metals
a common metalloid element is _________ and is the primary component of ___________; this element is used in making computer chips and glass silicon, sand
identify this element as a metal, non-metal or metalloid: gold metal
identify this element as a metal, non-metal or metalloid: sulfur non-metal
identify this element as a metal, non-metal or metalloid: barium metal
name two elements that have similar properties to sodium lithium, potassium, rubidium, cesium, francium
Created by: Keith Stevenson Keith Stevenson on 2011-11-06



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