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Chemistry
10th -
University
Chemistry - Periodic Law and Electron Shielding
35 questions
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- 1. Multiple Choice
Mendeleev organized the chemical elements based on their
symbols.
properties.
atomic numbers.
charges.
- 2. Multiple Choice
A horizontal row in the periodic table is called a(n)
family.
group.
octet.
period.
- 3. Multiple Choice
Which of the following elements is most similar in behavior to calcium?
magnesium
sodium
sulfur
chlorine
- 4. Multiple Choice
Which periodic group or family of elements is not correctly matched with its common family name?
Group 2: alkaline-earth metals
Group 3: alkali metals
Group 17: halogens
Group 18: noble gases
- 5. Multiple Choice
The electron configurations of main-group elements end in
d and f orbitals.
s and p orbitals.
s and d orbitals.
p and d orbitals.
- 6. Multiple Choice
Which of the following elements is a transition metal?
calcium
iron
sodium
sulfur
- 7. Multiple Choice
All the alkali metal elements are found on the periodic table in
Group 1.
Group 2.
Period 1.
Period 2.
- 8. Multiple Choice
A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is called
electron affinity.
electron configuration.
electronegativity.
ionization potential.
- 9. Multiple Choice
Which of the following elements has the greatest atomic radius?
Al
S
Si
C
- 10. Multiple Choice
Which of the following elements has the lowest electronegativity?
C
F
Li
O
- 11. Multiple Choice
Which of the following elements has the greatest ionization energy?
Ga
K
Bi
As
- 12. Multiple Choice
Which of the following elements has the lowest electron affinity?
Br
F
Cl
I
- 13. Multiple Choice
In which period is an element that has the electron configuration 1s22s22p63s23p63d104s24p1 when it is in its ground state?
Period 1
Period 2
Period 3
Period 4
- 14. Multiple Choice
Which of the following elements is not a metal?
H
K
Na
Fr
- 15. Multiple Choice
Which one of the following groups contains atoms that, in compounds, have the lowest attraction for electrons?
Group 1
Group 2
Group 16
Group 17
- 16. Multiple Choice
The metalloids are located on the periodic table between
halogens and noble gases.
nonmetals and metals.
alkaline-earth metals and other metals.
alkali metals and transition metals.
- 17. Multiple Choice
Moseley discovered that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing
atomic mass.
density.
radioactivity.
atomic number.
- 18. Multiple Choice
The halogens are located on the periodic table in Group
1.
2.
17.
18.
- 19. Multiple Choice
The number of valence electrons for Group 2 elements is
2.
8.
equal to the period number.
- 20. Multiple Choice
lanthanides and actinides
Group 1 elements
elements that make up the f block
elements of the s and p blocks
Group 17 elements
entire set of d-block elements
- 21. Multiple Choice
transition elements
Group 1 elements
elements that make up the f block
elements of the s and p blocks
Group 17 elements
entire set of d-block elements
- 22. Multiple Choice
alkali metals
Group 1 elements
elements that make up the f block
elements of the s and p blocks
Group 17 elements
entire set of d-block elements
- 23. Multiple Choice
halogens
Group 1 elements
elements that make up the f block
elements of the s and p blocks
Group 17 elements
entire set of d-block elements
- 24. Multiple ChoiceThe Shielding Effect is the result of interference between theprotons and neutronsprotons and electronsnucleus and valence orbitalatoms and molecules
- 25. Multiple ChoiceAs you move down a group, shieldingincreases because there are more orbitalsincreases because there are more protonsdecreases because the atomic radius increasesstays constant because the number of valence electrons stays the same
- 26. Multiple Choice
As you move across a period (row), the shielding effect
increases by a factor of 2
decreases by a factor of 2
stays constant
alternates for metals an nonmetals
- 27. Multiple ChoiceIf shielding remains constant, which of the following is NOT true when moving from left to right across a period (row)?the atomic radius decreasesthe metallic properties decreasethe electronegativity increasesthe atomic number decreases
- 28. Multiple Choice
How many valence electrons does this Bohr model have?
2
5
18
8
- 29. Multiple Choice
What is EFFECTIVE nuclear charge
The charge of an ion
The actual charge of the subatomic particles
The exact charge felt by the inner orbital (core) electrons
An approximation of the the actual charge exerted on the valence electrons
- 30. Multiple Choice
The correct formula for the effective nuclear charge is
Z eff = Z2 - S2 where Z is number of protons and S the number of core electrons
Z eff = Z - S where Z is number of protons and S the number of valance electrons
Z eff = Z - S where Z is number of protons and S the number of core electrons
Z eff = Z · S where Z is number of protons and S the number of core electrons
Z eff = Z / S where Z is number of protons and S the number of core electrons
- 31. Multiple Choice
The name of the chemist that in 1860 presented a convincing method for accurately measuring the relative masses of atoms allowing chemists to agree on standard values for atomic mass.
Albert Eistein
Henry Moseley
Dmitri Mendeleev
Ernest Rutherford
Stanislao Cannizzaro
- 32. Multiple Choice
The chemist who worked with Ernest Rutherford who examined the spectra of 38 different metals discovered that the fit into patterns better when they were arranged in increasing order according to nuclear charge, or the number of protons in the nucleus.
JJ Thomson
Albert Einstein
Henry Moseley
Dimitri Mendeleev
Stanislao Cannizzaro
- 33. Multiple Choice
Coulomb is the unit of which quantity?
Charge
Electron affinity
Electronegativity
Ionization Energy
Mass of an electron
- 34. Multiple Choice
Coulomb's Law quantifies the force that two charged objects exert on each other causing an attraction or repulsion between them. The law suggests that the greater the distance between opposite charges...
the lessor the force of repulsion.
the lessor the force of attraction.
the greater the force of attraction.
the greater the effective nuclear charge.
the greater the the release of deadly radiation.
- 35. Multiple Choice
Ionization Energy is measured...
by the pauling scale (0-4)i
as a ration that has no units
in KJ/mol and is a positive number
in KJ/mol and is a negative number
in Coulombs and is a positive number
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