Have an account?
Skip to Content
Build your own quiz
Suggestions for you
20 questions
Show Answers
See Preview
- 1. Multiple Choice
What is wrong with the following electron configuration:
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^10, 4s^2?
The 4s orbital is lower energy than the 3d orbital, so it fills first and therefore should be listed first.
The p orbital can only hold 4 electrons.
The highest energy orbital is always listed first.
Electron numbers should be written as subscripts, not superscripts.
- 2. Multiple Choice
What information is necessary for writing electron configurations?
All of the orbitals occupied by electrons, and the number of electrons in each.
The mass of the element.
The nuclear stability of the element.
The spin of the electrons.
- 3. Multiple Choice
What is the maximum number of electrons that can be found in a 5p cluster (or orbital) of a single atom?
ركز ي حبيبي
2
5
6
14
- 4. Multiple Choice
Which block is manganese (Mn) located in?
d-block
f-block
p-block
s-block
- 5. Multiple Choice
Element having electronic configuration
1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6,4d10,5s2,5p3
belongs to the group in the periodic table:
3rd A group
2nd A group
5th A group
7th A group
- 6. Multiple Choice
The electronic configuration of
Cr3+is:
[Ar]3d44s2
[Ar]3d34s0
[Ar]3d24s1
[Ar]3d54s1
- 7. Multiple Choice
Which of the following has the electronic configuration [Ar] 3d5?
Cr
Fe3+
Mn
V
- 8. Multiple Choice
Which element is represented by the following electronic configuration ?
Fluorine
Neon
Nitrogen
Oxygen
- 9. Multiple Choice
Determine the oxidation for the phosorprus atom: HPO42-.
+4
+5
+3
+2
- 10. Multiple Choice
The oxidation number of C in CO2 is :
+2
+1
+3
+4
- 11. Multiple Choice
What are the oxidation numbers of copper on the left and right hand sides of the following equation?
Cu + 2AgNO3 → 2Ag + Cu(NO3)2 ?
0 and +2
+1 and +2
+2 and +1
0 and +1
- 12. Multiple Choice
Which one of the following elements can only have one oxidation number ?
Hydrogen
Fluorine
Oxygen
Chromium
- 13. Multiple Choice
The sum of the oxidation numbers of all of the atoms in a neutral compound is 0. What is the oxidation number of sulfur in H2SO4?
+6
-6
-3
+3
- 14. Multiple Choice
What is the oxidation number of nitrogen in N2O4
+4
+2
-2
-3
- 15. Multiple Choice
When mercuric oxide is heated it breaks down to mercury and oxygen as follows:
HgO → Hg + O2
What is the oxidation number of mercury in mercuric oxide?
+2
-2
+1
-1
- 16. Multiple Choice
The alkaline earth metals (Be, Mg, Ca, Sr, Ba, and Ra) are always assigned an oxidation state of +2.
What is the oxidation number of sulfur in magnesium sulfide (MgS)?
-2
+2
+1
+4
- 17. Multiple Choice
True or false? All monatomic ions have an oxidation number of +1.
False
True
- 18. Multiple Choice
The modern periodic table is ordered on the basis of:
atomic mass
atomic number
atomic charge
atomic radius
- 19. Multiple Choice
Which of these things you will not find in the periodic table?
Atomic Number
Number of neutrons
Atomic Weight
Element Name and Symbol
- 20. Multiple Choice
Number of elements present in period 2 of the long form of periodic table.
2
8
18
32
- Answer choicesTagsAnswer choicesTags