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WorksheetsSubtopic 2.3
Total questions: 18
Worksheet time: 38mins
For which element does its ground state atom have the greater number of unpaired electrons?
Phosphorus (Z=15)
Titanium (Z=22)
Iron (Z=26)
Zinc (30)
Electron configuration of gallium is [Ar] 3d10 4s2 4p1. The order of electron removal in the formation of Ga3+ from first electron to second electron to third electron is is...
(Tips: Removing of electron is starting from the outermost shell @highest value of n)
4p , 4s , 3d
4p , 4s , 4s
4s , 4s ,4p
3d , 4s , 4s
Which of the following does not obey Hund's Rule?
According to Aufbau Principle, the electrons need to be filled in energy level 4s first then 3d.
When removing the electrons in the outermost shell of an atom that has 4s and 3d energy levels, the electron needs to be removed from which energy level first?
4s
3d
3p
1s
An atom containing eight electrons in 3d orbital are arranged according to....
Aufbau Principle
Hund's Rule
Pauli Exclusion Principle
An element Z has an electronic configuration as follows:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5
Which of the following statement(s) is/are true?
The element is in d-block.
The element tends to form Z-.
The element is in period 4 of the periodic table.
Which one of these is the definition of Aufbau's Principle?
In a given set of orbitals of equivalent energy (degenerate orbitals), electrons tend to occupy the orbitals singly first before pairing up.
No two electrons in an atom can have the same set of four quantum numbers.
The electrons must occupy available orbitals of lower energy first before they filled orbitals of higher energy.
Which one of these is the definition of Hund's Principle?
In a given set of orbitals of equivalent energy (degenerate orbitals), electrons tend to occupy the orbitals singly first before pairing up.
No two electrons in an atom can have the same set of four quantum numbers.
The electrons must occupy available orbitals of lower energy first before they filled orbitals of higher energy.
Which one of these is the definition of Pauli Exclusion Principle?
In a given set of orbitals of equivalent energy (degenerate orbitals), electrons tend to occupy the orbitals singly first before pairing up.
No two electrons in an atom can have the same set of four quantum numbers.
The electrons must occupy available orbitals of lower energy first before they filled orbitals of higher energy.
How many anomalous cases in electronic configuration that exceptional to Aufbau's Principle?
1
2
3
4
How many unpaired electron found in actual configuration of Cu?
Cu: Z=29
1
4
5
6
In actual electronic configuration of Cu shows exception to the Aufbau's principle because Cu will achieve an extra added stability if Cu has a....
half-filled d-orbital
completely-filled d-orbital
half-filled s-orbital
In actual electronic configuration of Cr shows exception to the Aufbau's principle because Cr will achieve an extra added stability if Cr has a....
half-filled d-orbital
completely-filled d-orbital
half-filled s-orbital
How many methods are there in writing electronic configuration of an atom?
1
2
3
4
Give the possible value of n, l, m of fourth electron in actual configuration of Cr.
Cr: Z=24
n= 2, l=1, m=0
n= 2, l=0, m=0
n= 2, l=1, m=-1
n= 2, l=1, m=1
What is the valence (outermost) orbitals in actual configuration of copper?
1s22s22p63s23p64s13d10
3d
4s
4s and 3d
For element A that has electronic configuration of 1s2 2s2 2p6 3s2 3p4 , what is the oxidation number of element A
+1
-2
+2
-1
For element D that has electronic configuration of 1s2 2s2 2p6 3s2 3p6 3d10 4s1, what is the oxidation number of element D?
+1
-2
+2
-1
