Flashcards in General Chemistry- The Periodic Table Deck (189)
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1
What atomic number is lithium (Li)?
3
2
What type of element is Lithium?
Soft Alkali metal
3
What are the specific characteristics of lithium?
Least dense solid element (specific gravity .53)
Does not naturally occur on earth in its elemental form
Found only in various salt compounds
4
Which chemist published the 1st periodic table? When?
Dmitri Mendeleev in 1869
5
What did Dmitri Mendeleev find?
Ordering known elements according to atomic weight revealed a pattern of periodically recurring physical and chemical properties.
6
Who has revised the periodic table?
Henry Moseley
7
How did Henry Moseley revise the periodic table?
Organized the elements based on increasing atomic number rather than atomic weight
8
What did the revision to the periodic table allow?
Elements to be predicted and discovered
9
The periodic table creates a visual representation of what?
The periodic law
10
What is the periodic law?
The chemical and physical properties of the elements are dependent, in a periodic way, upon their atomic number
11
How is the periodic table arranged?
Arranged elements into periods (rows) and groups/families (columns)
12
How many periods does the periodic table have?
7 periods
13
What do the periods represent?
The principal quantum numbers n=1 through n=7 for the s and p block elements
14
What do groups contain?
Elements that have the same electronic configuration in their valence shell and share similar cchemical properties.
15
The elements are recorded how, in the periodic table?
In their neutral state
16
What do the roman numerals represent?
The number of valence electrons elements in that group have in their neutral state.
17
What are "A" elements known as?
The representative elements
18
"A" elements have their valence electrons in which orbitals?
S or p subshells
19
What are "B" elements known as?
Nonrepresentative elements
20
Which groups are associated with "B" elements?
The transitions elements
Lanthanide and actinide series
21
Where are the valence electrons for "B" elements for transition elements and lanthanide/actinide elements?
Transition elements: s and d subhsells
Lanthanide/Actinide: s and f subshells
22
Which elements may have unexpected electron configurations?
The nonrepresentative elements
23
Examples of unexpected electron configurations?
Chromium (4s1 3d5)
Copper (4s1 3d10)
24
Which identification system are the elements not listed under A and B?
IUPAC
Groups are number 1 to 18
25
Mendeleev's table was arranged by atomic weight, but the moder periodic table is arranged by...
Atomic number
26
What are the three categroies of the periodic table?
Metals
Nonmentals
Metalloids (semimetals)
27
Where are the metals found on the periodic table?
The left side and in the middle of the periodic table
28
What do the 3 categroies of metals include?
Active metals
Transitions metals
Lanthanide and actinide series
29
What are the characteristic of metals?
Lustrous (shiny) solids
High melting point and densities
Malleability
Ductility
30
