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Total questions: 45
Worksheet time: 42mins
The statement that an electron occupies the lowest available energy orbital is
Hund's Rule
AUfbau principle
Bohr's law
The Pauli Exclusion principle
The atomic sublevel with the next highest energy after 4p is
4d
4f
5s
5p
In the electron configuration for scandium (atomic number 21), what is the notation for the three highest-energy electrons?
4s2, 3d1
3d3
4s3
4s2 4p1
Which two particles are contained in the nucleus of an atom?
Protons and Neutrons
Protons and Electrons
Electrons and Neutrons
Haw many maximum electrons can be present in the "M" shell of an atom?
2
8
18
32
An atom has atomic number 4 the number of electrons in its outermost orbit will be ?
2
6
4
1
How many energy shells/levels does this atom have?
1
2
3
4
The electron configuration of an atom is 1s22s22p6 The number of electrons in the atom is
3
5
6
10
An orbital can at most hold how many electrons?
1 electron
2 electrons
3 electrons
4 electrons
What is the Aufbau principle?
Within an energy level, s orbitals are the lowest energy, followed by p, d and then f. F orbitals are the highest energy for that level.
All three.
The lower the principal quantum number (n) the lower the energy.
The Aufbau Principle states that electrons enter the lowest energy orbitals first.
Identify the rule that is being violated
Aufbau's Principle
Pauli's Exclusion Principle
Hund's Rule
Heisenberg uncertainty principle
All orbitals of equal energy (degenerate orbitals) are occupied by one electron before any single orbital is occupied by a second electron.
Aufbau Principle
Hund’s Rule
Pauli's Exclusion Principle
Core Notation
Which rule is violated in the following orbital diagrams?
Hund's Rule
Pauli's Exclusion Principle
Aufbau Principle
Which of the following describes the shape of the orbital?
principal quantum number
azimuthal quantum number
spin quantum number
magnetic quantum number
Which of the following shows how the electrons are distributed among the various orbitals?
Quantum numbers
Electron Configuration
Aufbau Principle
Hund's Rule of Multiplicity
Which electron configuration belongs to Chlorine (Cl)?
1s22s22p63p5
1s22s22p63s23p7
1s22s22p63s23p6
1s22s22p63s13p7
What atom matches this electron configuration?
Zinc
Nickel
Copper
Germanium
Which of the following statements regarding electronic orbitals is/are correct?
Each p-orbital can hold a maximum of six electrons.
The 3p-orbitals have a higher energy level than the 3s-orbital.
The three 3p-orbitals have slightly different energy levels.
The 1s-orbital has the same size and shape as the 2s-orbital.
Chemists can identify the composition of some unknown salts by conducting a flame test. When potassium salts are heated in a flame, a purple color is observed.
This is due to the movement of electrons between energy levels. What is the electron configuration of a potassium atom at ground state?
1s2; 2s2; 2p6; 3s2; 3p6; 4d1
1s2; 2s2; 2p6; 3s2;3p6; 3d1
1s2; 2s2; 2d6; 3s2; 3d6; 4s1
1s2; 2s2; 2p6; 3s2; 3p6; 4s1
1s22s22p63s23p64s23d10
Which one of the following is the electronic configuration of the bromine atom?
1s22s22p63s23p63d104s14p6
1s22s22p63s23p63d104s24p7
1s22s22p63s23p63d104s24p5
1s22s22p63s23p63d104s24p6
The vanadium atom (atomic number 23) in its ground state has the electronic configuration:
1s2 2s2 2p6 3s2 3p6 3d3 4s2
1s2 2s2 2p6 3s2 3p6 3d2 4s3
1s2 2s2 2p6 3s2 3p6 3d1 4s2 4p2
1s2 2s2 2p6 3s2 3p6 3d2 4s2 4p1
Electronic configuration of boron
1s2 3s2 2p1
1s2 2s2 2p1
1s2 2s5 2p1
1s1 2s2 2p2
Electronic configuration of Neon
1s1 2s2 2p7
2s2 2p2 2p6
1s4 2s4 2p2
1s2 2s2 2p6
Electronic configuration of Neon
1s1 2s2 2p7
2s2 2p2 2p6
1s4 2s4 2p2
1s2 2s2 2p6
What is incorrect about this orbital diagram?
Both arrows in the filled 2p box should be pointing the same direction
In the there should only be 1 arrow in the first 2p box and one in the 2nd 2p box
There is nothing incorrect with this diagram
All the arrows should be pointing the same direction.
How many orbitals are present in the n = 3 main energy level?
A. 12
B. 3
C. 9
D. 7
Which is the correct orbital diagram (arrows in boxes) for a carbon atom?
A
B
C
D
What is the electron configuration of a copper atom?
A. 1s22s22p63s23p63d9
B. 1s22s22p63s23p64s13d10
C. 1s22s22p63s23p64s23d9
D. 1s22s22p63s23p64s23d10
Which is the correct orbital diagram (arrows in boxes) for the 4s and 3d orbitals in the Fe3+ ion?
A
B
C
D
Which of the following is the electronic configuration for Mg2+ ion?
1s2 2s2 2p6
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p2
1s2 2s2 2p6 3s2
Which one of the following contains no unpaired electrons in the ground state?
Be
F
Si
N
Which are the four atomic orbitals?
(a)
Within an energy level, which orbitals are the lowest in energy?
s
f
d
p
What is the Aufbau principle?
Within an energy level, s orbitals are the lowest energy, followed by p, d and then f. F orbitals are the highest energy for that level.
The lower the principal quantum number (n) the lower the energy.
All three.
The Aufbau Principle states that electrons enter the lowest energy orbitals first.
What is the maximum numbers of electrons when n=2, l=0
(a)
Identify the rule that is being violated
Aufbau's principle
Hund's rule
Pauli Exclusion principle
Heisenberg uncertainty principle
What is incorrect about this orbital diagram?
Both arrows in the filled 2p box should be pointing the same direction
There is nothing incorrect with this diagram
In the there should only be 1 arrow in the first 2p box and one in the 2nd 2p box
All the arrows should be pointing the same direction.
The electron configuration of an atom is 1s22s22p2. The number of valence electrons in the atom is
(a)
