CH 1 Lesson 2
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Easy
abdelhameed adeeb
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why is the atomic mass of nickel considered abnormal in the first transition series?
Due to its high atomic number
Due to the presence of five stable isotopes with an average mass of 58.7 u
Due to its large atomic radius
Due to its high melting point
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why is the atomic radius nearly constant from chromium (Cr) to copper (Cu) in the first transition series?
Due to the decrease in nuclear charge
Due to the increase in the number of 3d electrons causing repulsion
Due to the decrease in the number of electrons
Due to the decrease in atomic mass
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why are the elements of the first transition series used in making alloys?
Due to their high melting points
Due to their high densities
Due to the relative constancy of their atomic radii
Due to their metallic luster
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why do the elements of the first transition series have high melting and boiling points?
Due to the weak metallic bonds
Due to the large number of electrons forming strong metallic bonds
Due to their large atomic size
Due to their low atomic mass
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why is the magnetic moment of manganese (25Mn) larger than that of cobalt (27Co)?
Because manganese has more paired electrons
Because cobalt has more unpaired electrons
Because manganese has 5 unpaired electrons in the 3d sublevel
Because cobalt has a larger atomic radius
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why are transition metals considered ideal catalysts?
They have high melting points.
They have large atomic radii.
They participate in the formation of bonds between reacting molecules and atoms on the surface of the metal.
They are non-reactive.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is used in the decomposition reaction of hydrogen peroxide?
Divided Nickel
Manganese dioxide
Vanadium pentoxide
Divided Iron
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