periodic table.....aims

 

 

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aim 1.....how are elements arranged in the periodic table? quiz

aim 2.....how can elements be differentiated? quiz

aim 3.....what are the trends of the periodic table? quiz

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cross-word puzzle

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skills students should be able to do

real-world connection

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real-world connections

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Words: behaves, crystal, density, exist, identifies, increasing, location, metalloids, notations, physical, properties, similar, succession, sum, trends

 

The placement or _________ of elements on the Periodic Table gives an indication of physical and chemical properties of that element. The elements on the Periodic Table are arranged in order of __________ atomic number. The number of protons in an atom (atomic number) __________  the element. The ____ of the protons and neutrons in an atom (mass number) identifies an isotope. Common ________ that represent isotopes include: 14 C, carbon-14, C-14. Elements can be classified by their properties and located on the Periodic Table as metals, nonmetals, __________ (B, Si, Ge, As, Sb, Te, At), and noble gases. Elements can be differentiated by their _________ properties. Physical properties of substances, such as ________, conductivity, malleability, solubility, and hardness, differ among elements. Elements can be differentiated by chemical _________. Chemical properties describe how an element ________ during a chemical reaction. Some elements ______ in two or more forms in the same phase. These forms differ in their molecular or ________ structure, and hence in their properties. For Groups 1, 2, and 13-18 on the Periodic Table, elements within the same group have the same number of valence electrons (helium is an exception) and therefore ________ chemical properties. The succession of elements within the same group demonstrates characteristic _______: differences in atomic radius, ionic radius, electronegativity, first ionization energy, metallic/nonmetallic properties. The ____________ of elements across the same period demonstrates characteristic trends: differences in atomic radius, ionic radius, electronegativity, first ionization energy, metallic/nonmetallic properties.

 

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quiz 1

 

Question #1
The elements on the Periodic Table are arranged in the order of increasing
[A] electronegativity
[B] atomic mass
[C] valence electrons
[D] protons

Question #2
Elements in the same group have
[A] similar physical properties and different chemical properties
[B] different physical properties and different chemical properties
[C] similar physical properties and similar chemical properties
[D] different physical properties and similar chemical properties

Question #3
Which notation for representing an isotope is incorrect?
[A] 14 C
[B] 14 carbon
[C] carbon-14
[D] C-14

Question #4
What is the name of the element with 15 electrons, 15 protons, and 16 neutrons?
[A] sulfur
[B] gallium
[C] zinc
[D] phosphorus

Question #5
An atom with 20 protons and 22 neutrons is
[A] the element calcium
[B] the element scandium
[C] an isotope of scandium
[D] an isotope of calcium

Question #6
Which is the correct order of the classification of elements when going from left to right on the Periodic Table?
[A] nonmetals, metalloids, metals, noble gases
[B] noble gases, metals, metalloids, nonmetals
[C] metals, nonmetals, noble gases, metalloids
[D] metals, metalloids, nonmetals, noble gases

Question #7
Elements can be differentiated by their physical properties?
True
False

Question #8
Which element has a silvery luster, is malleable, and is a good conductor of heat and electricity?
[A] H
[B] Se
[C] Ag
[D] C

Question #9
Which group of elements have the same number of energy levels?
[A] Li, Na, K
[B] Ca, Ti, Sr
[C] Al, Si, P
[D] He, Ne, Ar

Question #10
At STP, it is a solid.
[A] Hg
[B] S8
[C] Cl2
[D] Ar
 

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quiz 2

 

Question #1
Chemical properties describe how an element behaves during a chemical reaction
True
False

Question #2
Elements within the same group have similar chemical properties, because elements within the same group
[A] have the same number of valence electrons
[B] have the same atomic radius
[C] have the same electron configuration
[D] have the same atomic mass

Question #3
Which of the following does NOT describe allotropes?
[A] allotropes are elements that exist in two or more forms in the same phase
[B] allotropes differ in their molecular structure
[C] allotropes differ in their crystal structure
[D] allotropes have identical physical and chemical properties

Question #4
Elements CANNOT be differentiated by chemical properties.
True
False

Question #5
Which of the following does not describe elements in group 1?
[A] they are the alkali metals
[B] they are the alkaline earth metals
[C] ionization energy decreases as atomic number increases
[D] Reactivity increases as atomic number increases

Question #6
Which of the following describes the elements in group 2?
[A] They are the most reactive metals, due to their low ionization energy.
[B] They occur in nature only in compounds because of their high reactivity.
[C] They are called alkali metals
[D] They are called halogens

Question #7
Which of the following correctly describes the elements in group 3-12, the transition elements?
[A] Each group of the transitional elements have same number of valence electrons
[B] The transition elements have all three phases of matter
[C] Many transitional elements and their aqueous solutions are colored
[D] The transitional elements have the lowest ionization energy.

Question #8
Which of the following does not describe helium?
[A] Helium is one of the noble gases
[B] Helium is an exception to the group 18, because it only has two valence electrons
[C] Helium is a monoatomic gas
[D] Helium has the lowest ionization energy

Question #9
Which of the following does not describe elements in group 17?
[A] They are the halogens
[B] Reactivity decreases as atomic number increases
[C] They form compounds only in laboratory experiments
[D] They illustrate the three phases of matter in the same group at STP

Question #10
Which metal can only be obtained by the electrolysis of its fused salt?
[A] Kr
[B] Cu
[C] Zn
[D] Li
 

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quiz 3

 

Question #1
In groups, atomic radii increase with atomic number because
[A] the number of energy level increases.
[B] the number of energy level decreases.
[C] the number of protons decreases.
[D] the number of protons increases.

Question #2
In periods, atomic radii decrease when atomic number increases because the nuclear charges increase, pushing electrons away from the nucleus.
True
False

Question #3
Which element has an ionic radius smaller than its parent atom?
[A] I
[B] O
[C] Se
[D] Mg

Question #4
In groups, electronegativity decreases when atomic number increases because
[A] the added energy levels decrease the power of the nucleus to attract electrons.
[B] the added energy levels increase the power of the nucleus to attract electrons.
[C] the added energy levels shield the power of the nucleus to attract electrons.
[D] the added energy levels shield the power of the nucleus to repel electrons.

Question #5
In periods, electronegativity increases with atomic number because the increase in nuclear charge makes the nucleus more powerful to hold on to electrons.
True
False

Question #6
In groups, ionization energy decreases when atomic number increases because the added energy levels
[A] cancel the power of the nuclear charge making it easier to remove outermost electrons.
[B] decrease the power of the nuclear charge making it easier to remove outermost electrons.
[C] increase the power of the nuclear charge making it easier to remove outermost electrons.
[D] shield the power of the nuclear charge making it easier to remove outermost electrons.

Question #7
Which set of elements shows an increase in ionization energy?
[A] Cl, S, P, Si
[B] Cl, Si, P, S
[C] Si, P, S, Cl
[D] Si, Ge, Sn, Pb

Question #8
What are the two elements representing the two extremes in metallic character?
[A] F and Cs
[B] Ne and Li
[C] He and H
[D] F and Fr

Question #9
Which metal is the most reactive?
[A] K
[B] Ca
[C] Ni
[D] Cu

Question #10
From F to Cl to Br to I the reactivity increases.
True
False
 

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