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Periodic Table of Elements
chem reading questions 5.1-5.2
Terms in this set (37)
who was the first chemist to organize the newly found elements in a table
How did Dimitri Mendeleev arrange the periodic table?
Mendeleev realized that the physical and chemical properties of elements were related to their atomic mass in a 'periodic' way, and arranged them so that groups of elements with similar properties fell into vertical columns in his table. (aka atomic weight)
something that occurs in a repeating pattern is referred to as
the procedure used to make the first periodic table left _________________ and there were several elements that were exceptions to the procedure.
who worked on the next version of the table
How did Moseley arrange the periodic table?
By atomic number
What is the periodic law?
when the elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties
The ___________ is the arrangement of the elements in order of their _____________ so that elements of similar _______________ fall in the same, column, or group.
Periodic tables, atomic #, properties
What is a row on the periodic table called?
what are the f-block elements in period 6 called
what are the d-block elements in period 7 called
periodicity is explained by the arrangement of _________________ around the ____________________
the nonreactive elements in group 18 are known as the _________________. these elements do not react because their outermost energy levels are full of electrons.
what is the "n" used for
which groups are included in the s block
which groups are included in the p block
what is the name of group 1 elements
what is the name of group 2 elements
alkaline earth metals
all of the elements in groups 1-12 are ______________
which s-block group in more reactive
define valence electrons
the electrons on the outer energy level
how many valence electrons would be in a full outer energy level
valence electrons are located in the _________________ main energy level
what are the chemical and physical properties of group 1 elements
chemically reactive metal; 1 valence electron
what are the chemical and physical properties of group 2 elements
chemically reactive metals; 2 valence electrons
group 1 elements have _____ valence electrons while group 2 elements have ______________
how is hydrogen different from the other elements in its group
it has different properties
how is helium different from the other elements in its group
it has only 2 valence electrons
elements in groups 3-12, or _____________ elements, are called
d-block transition elements
describe reactivity, chemical and physial properties of the elements in groups 3-12
elements in the s-block and p=block are known as the __________ elements
for p block elements, the total number of electrons in the highest occupied level "n" is equal to the group number minus _________________
Where are nonmetals located on the periodic table?
right of staircase
the most reactive nonmetals are known as the ________________. They are reactive because they have __________________- valence electrons , which is just one electron short of a full outer shell
brittle solids that have properties of both metals and non metals are known as the ____-, or semi conductors
describe the reactivity, chemical, and physical properties of lanthanides
shiny metals similar in reactivity to the group 2
eleven of the actinides are __________ elements. the first __________ are naturally found on earth
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