Download Periodic trends Tempura

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Periodic trends Tempura
1. Which of the following pairs have similar properties
A. Na and Ca
B. Na and Cs
C. Na and Be
D. Na and Mg
2.
Mendeleev is given credit for the development of the PT. What is the major difference
in the table he developed and the modern periodic table?
Mendeleev said that the properties of the elements are periodic if elements are arranged by
increasing atomic mass. The use of mass was incorrect as Mendeleev found with the
discovery of reversed pairs. Modern periodic law says the properties are periodic (and
elements are in the same column if they have similar properties) if the elements are
arranged by increasing atomic number.
3. Why did Mendeleev leave gaps in his periodic table?
When Mendeleev was arranging the periodic table, many elements had not been
discovered. Mendeleev left gaps for these missing elements and predicted many of their
properties from their location on the periodic table.
4. List some properties of metals and nonmetals.
Metals- shiny, conduct heat and electricity, malleable, ductile, react with hydrochloric acid
Nonmetals – dull, do not conduct heat and electricity, brittle, do not react with HCl
5. What are valence electrons and how they are responsible for chemical properties of an
atom?
Electrons in outermost orbit
6. An element is located on the left of the periodic table, is shiny, malleable, conducts heat,
and has few electrons in its outer level. The element is a
A.
metal
B.
nonmetal
C.
metalloid
D.
cannot be determined from the
7. Across a period which element loses electrons readily?
metals
8. Name the following parts of the periodic table.
A. Column 1 (IA)
B. Column 2 (IIA)
C. Column 17 (VIIA)
D. Column 18 (VIIIA)
E. Columns 3-12 (IB – VIIIB)
F. Elements 57 – 71
G. Elements 89 – 103
H. Vertical columns
A. alkali metals
B. alkaline earth metals
C. halogens
D. noble gases
E. transition elements
F. Lanthanide series
G. Actinide series
H. groups/families
9. Which of the following in group 16 will have the strongest metallic properties
A. O
B.Se
C.Te
D.Po
10. Why does ionization energy increase as atomic radius decreases?
A stronger nucleus means electrons are held tighter to the nucleus and the most
loosely held electron is harder to remove.
11. What is electronegativity difference?
b. Explain the bond characteristics expected for bonds with an electronegativity difference
between.5 and 2 polar covalent bond
c. Explain the bond characteristics expected for bonds with an electronegativity difference less
than .5 non polar covalent
d. Explain the bond characteristics expected for bonds with an electronegativity difference >2
ionic
d. Which one is more polar H-I or H-Cl based on the given data
Element
H
I
Cl
Electrongativity
2.1
2.7
3.2
12. What is the difference in electron activity for metallic properties and for nonmetallic
properties?
A.
metals lose electrons; nonmetals gain electrons
B.
nonmetals lose electrons; metals gain electrons
C.
metals react to get 6 electrons in their outer level
D.
nonmetals react to get 6 electrons in their outer level.