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What two 19th century scientists created the modern periodic table?

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Dmitri Men...

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Which of these atoms has the largest radius?


A) B
B) Ga
C) Br
D) Si
E) Cl

F) C) and D)
G) B) and D)

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Which element in Group 6A has the highest electron affinity?


A) O
B) S
C) Se
D) Te
E) Po

F) A) and D)
G) B) and E)

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What is the definition of electron affinity?

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The energy released (the negat...

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Which one of these ions has the smallest radius?


A) Cl-
B) K+
C) S2-
D) Na+
E) O2-

F) C) and E)
G) B) and E)

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Select the element with the greatest metallic character.


A) Li
B) Ca
C) Al
D) Pb
E) Cs

F) B) and C)
G) A) and B)

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Explain what is meant by a diagonal relationship in the periodic table and give an example.

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A diagonal relationship refers...

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Which element would be expected to have properties similar to antimony?


A) Se
B) Sn
C) P
D) As
E) Pb

F) A) and E)
G) B) and E)

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Which ion is isoelectronic with Ar?


A) Fe2+
B) F-
C) Br-
D) Ga3+
E) Ca2+

F) C) and E)
G) B) and E)

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Which one of these elements is a transition element?


A) Nickel
B) Tin
C) Sodium
D) Sulfur
E) Calcium

F) B) and E)
G) A) and D)

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An isoelectronic series is


A) a series that has two or more species that have identical nuclear charges,but have different electron configurations.
B) a series that has the same ionization potentials.
C) a series that can have only up to three species and have similar electron configuration and similar nuclear charges.
D) a series that has two or more species that have identical electron configurations,but different nuclear charges.
E) a series that has the same nuclear charge.

F) D) and E)
G) A) and C)

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In neutral atoms,the 3d orbitals have higher energy than the 4s orbitals.

A) True
B) False

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Elements with ________________ first ionization energies and ___________ electron affinities generally form cations.


A) low,very negative
B) high,positive or slightly negative
C) low,positive or slightly negative
D) high,very negative
E) None of these is generally correct.

F) A) and B)
G) All of the above

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Which member of the halogen family has the largest first ionization potential (energy)?

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Which of these elements exhibits chemical behavior similar to that of oxygen?


A) magnesium
B) sodium
C) sulfur
D) chlorine
E) iron

F) None of the above
G) All of the above

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If the radius of atom X is greater than the radius of atom Y,then it is also likely that


A) X has a larger electron affinity than Y does.
B) X has a larger effective nuclear charge than Y does.
C) X has greater metallic character than Y does.
D) X has a larger first ionization energy than Y does.
E) X is a poorer conductor of electricity than Y when in the solid state.

F) C) and D)
G) D) and E)

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How many valence electrons does a carbon atom have?


A) 1
B) 2
C) 3
D) 4
E) 6

F) None of the above
G) B) and D)

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Atomic size decreases across a period due to an increase in the effective nuclear charge,Zeff.

A) True
B) False

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Which of these elements has the greatest electron affinity?


A) K
B) Br
C) As
D) Ar
E) I

F) A) and E)
G) A) and D)

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Coulomb's law is the attractive force (F)between two oppositely charged particles (Q1 and Q2).It is directly proportional to the product of the charges and inversely proportional to the distance (d)between the objects cubed.

A) True
B) False

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