Section Quiz: History of the Periodic Table – Flashcards
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the periodic law states that the physical and chemical properties of elements are periodic functions of their atomic
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numbers
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which group of elements was discoverd by Strutt and Ramsay
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noble gases
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a repeating pattern is referred to as
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periodic
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on most periodic tables, the lanthanides and actinides appear
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below the main portion
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what is the difference in atomic number between He and Ne
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8
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which noble gas has the greatest atomic number
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Rn
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an element that has the electron configuration [Ne]3s^2 3p^5 is in period
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3
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an element that has the electron configuration [Ne]3s^2 3p^5 is in group
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17
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element in the s and p block of the periodic table are called
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main-group metals
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elements in group 18 have
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very low reactivity
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nonmetallic elements in group 17 that react with most metals to form salts are
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halogens
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the outer-level electron configuration of a neutral alkanline-earth metal atom consists of
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two electrons in the s orbital
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in nature the alkali metals are found only in compounds because they
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are very reactive elements
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to which group does hydrogen belong
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none of the groups
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an element found in group 3_12 of the periodic table is classified as a(n)
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transition metal
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in which group is an element that has an outer-level electron configuration consisting of one electron in the d orbital and two electrons in the ns orbital
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group 3
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an electron that is in the highest energy level of an atom and determines the atom's chemical properties is called a(n)
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valence electron
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what can be removed form an atom if ionization energy is supplied?
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an electron
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across a period in the periodic table, ionization energy is due to
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increases
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down a group in the periodic table, the change in ionization energy is due to
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increasing electron shielding
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the atomic radius of an atom that is chemicallly bonded to an identical atom is equal to
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half the distance between the nuclei
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across a period in the periodic table, atomic radii generally
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decrease
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down a group in the periodic table, atomic radii generally
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increase
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one of the least electronegative elements would be found on the periodic table in
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group 1, period 7
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as the atomic numbers of thhe metals of group 1 increase, the ionic
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increase
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sodium is a metal, nonmetal or a semimetal
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metal
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silicon is a metal, nonmetal or a semimetal
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semimetal
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neon is a metal, nonmetal or a semimetal
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nonmetal
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calcium is a metal, nonmetal or a semimetal
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metal
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nitrogen is a metal, nonmetal or a semimetal
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nonmetal
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the name for group 1A is
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alkali metals
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the name for group 2A is
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alkaline earth metals
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the name for group 3A is
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group of one semimetal and four metals
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the name for group 4A is
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carbon family
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the name for group 5A is
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nitrogen family
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the name for group 6A is
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oxygen family
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the name for group 7A is
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halogens
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the name for group 8A is
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noble gases
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d-block elments name is
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transition metals
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f-block elments name is
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inner transition metals
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[Ne]3s^1 which is an example of noble gas inner core
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[Ne]
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[Ne]3s^1 which is an example of energy level
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3
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[Ne]3s^1 which is an example of number of e- m that orbital
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^1
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[Ne]3s^1 which is an example of orbital shape
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s
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