Development of the Periodic Table
Who is regarded as the father of the periodic table?
Dimitri Mendeleev
What is another name for Group 7A of the periodic table?
The Halogens
Which side of the periodic table will gain electrons to form an octet of valence electrons?
Right side, nonmetals
What is effective nuclear charge? What does it tell us?
Effective nuclear charge (Zeff) is the positive charge from the nucleus felt by an electron. The Zeff tells us how strongly the nucleus is attracted to an electron.
By what property did Mendeleev organize the periodic table?
Atomic weight
Group 1A = Alkali metals
Group 2A = Alkaline earth metals
Which side of the periodic table will lose electrons to obtain an octet of valence electrons?
Left side, metals
Which atom has a larger atomic radius: gallium or germanium?
Gallium
Who created the "modern" version of the periodic table?
Henry Moseley
Which group of the periodic table has 6 valence electrons?
Group 6A (16, the oxygen family)
Which group of the periodic table is classified as violently reactive?
Group 1A, alkali metals
Which species has a larger radius: O2- or O?
O2-
By what property did Moseley organize the periodic table?
Atomic number (# of protons)
Which group of the periodic table has a 2- charge when ionized?
Group 6A (16, the oxygen family)
An element is shiny, an okay conductor, and hard. Which category (metal, metalloid, or nonmetal) might this element fall into?
Metalloid
Which atom has higher ionization energy: Si or P
P
What did Glenn Seaborg contribute to our understanding of the periodic table?
He extended the periodic table by discovering transuranium elements and proposed the actinide series.
What are the charges of transition metals?
It varies!
Write at least 3 properties of noble gases.
(2) They are unreactive
(3) They neither gain nor lose electrons
(4) They exist as gases at STP
(5) They exist monatomically (one atom)
What are the 3 most electronegative elements, starting with the most electronegative element?
F, O, N