chem study
Which of the following corresponds to Hund's Rule?
(AR) 4s 1 box: UP 3d 5 boxes: ALL up
"The quantum number of an electron is given below" Which of the following represents the electron in the same orbital with the one above?
2, 1, 1, -1/2 (image 3)
Use the following electron configuration of europium How many principal energy levels are completely filled?
3
Which diagram describes how electrons fill the 3p orbital for sulfur?
3 boxes: 1 ( up&down ) 2 (up) 3 (up)
Which diagram describes the 2porbital for silicon?
3 boxes: 1 (up&down), 2 (up&down), 3 (up&down)
What sublevel immediately follows the 6s sublevel?
4f
Which orbital is filled after 6s?
4f
A new electron will enter into _____ if 3d orbital is completely filled.
4p orbital
Which diagram describes the 3d orbital for chromium?
5 boxes: ALL up (3d)
Identify the orbital of the excited electron in the atom with an electron configuration of [Xe]6s24f145d96p1.
6p
Using the Aufbau diagram, the valence electron of lead that has the lowest energy is located in what sublevel?
6s
Using the periodic table, which of the following is the correct electron configuration of vanadium in its ground state?
[Ar]4s^2 3d^3
Each quantum number that describes the two electrons in a helium atom is identical, except for the one that indicates their
spin
what is generally considered to be the fourth quantum number?
spin quantum number
The two electrons in a helium atom occupy _____ orbital(s) and have _____ electron spins.
the same; opposite
Electron configurations of atoms in the ground state generally follow Hund's Law. Why does the electrons configuration of copper in the ground state violate Hund's law?
Copper's electron configuration corresponds with most stable state
Up to _______, electron-electron repulsion does not come into the picture as there is no pairing of electrons in the d-subshell
chromium
What is the chemical symbol for the element that has the electron configuration described by the Aufbau diagram above? (image 4)
Al
For the principal quantum number n equals 2, we can have _____ sub-levels.
Both A and B
"the quantum number of an electron is given below" The quantum number of another electron is given below. If it's in the same atom as the electron above, what possible values of A are valid?
0
How many unpaired electrons does calcium have? You may need to draw the orbital filling diagram for the last sublevel that contains electrons.
0
If the above quantum number describes 2 different electrons in an oxygen atom, and the angular momentum number X is 1, what is the possible number of Y?
0
If the above quantum numbers describe two different electrons in an oxygen atom, and the angular momentum number X is 1, what is the possible number of Y? ___
0
The number of unpaired electrons in an atom can be determined from the orbital filling diagrams and correctly applying Hand's rule. Boron has one unpaired electron, while carbon has 2, and nitrogen has 3. How many unpaired electrons does fluorine have?
1
The number of unpaired electrons in an atom can be determined from the orbital filling diagrams and correctly applying Hund's rule. Boron has one unpaired electron, while carbon has two, and nitrogen has three. How many unpaired electrons does fluorine have?
1
How many electrons are in an atom with the electron configuration of 1s22s22p63s1?
11
Use the following electron configuration of europium, How many sublevels are occupied?
13
What is always the lowest energy sublevel for any atom?
1s
Which of the following correctly lists the sublevels in order of increasing energy?
1s, 2s, 2p, 3s, 3p, 4s, 3d
What is the electron configuration of the element in period 2 that has 6 valence electrons?
1s^2 2s^2 2p^4
This process of building up the atoms by adding one proton to the nucleus and one electron to the electron cloud is known as the _____.
Aufbau principle
In an electron configuration code, superscripts placed on sub-levels indicate the number of _____.
Electrons
The Pauli Exclusion Principle states that no electrons are paired in a given orbital until all the orbitals of the same sub-level have received at least one electron.
FALSE
The electronic configuration of carbon is 2,2,2.
FALSE
True or False: It's impossible for two electrons to occupy the same 2s orbital because it is a violation of the Pauli Exclusion Principle.
False
In the orbital diagram above, which of the following does it violate?
Hund's Rule
An atom has the electron configuration of . How many electrons are in that atom?
Nine
No two electrons in an atom can have the same set of four quantum numbers.
TRUE
Two electrons in an atom may have their first three quantum numbers the same as long as they have opposite spins.
TRUE
What do all of the elements in a given horizontal row of the Periodic Table have in common?
They have the same number of occupied principal energy levels.
Which statement about quantum numbers is NOT correct?
Two or more electrons in an atom can have the same set of quantum numbers.
The Pauli exclusion principle states that, no two electrons in an atom can have the same set of ________ quantum numbers.
four
The location of any electron in an atom can be described by ____ unique quantum numbers.
four
Which of the following is the correct Aufbau diagram for phosphorus?
image 1
Which Aufbau diagram describes the electron configuration of copper?
image 2
which afabu diagram describes the electron configuration of copper?
image 5
If 2 orbitals have the same (n + 1) value, the orbital with the lower value of n has _________ energy and is therefore filled first
lower
"the quantum number of an electron is given below" which of the following represents the electron in the same orbital with the one above
n (2) l (1) ml (1) ms (-1/2)
The energy of the electron is specified by which three quantum numbers?
n, l, ml
The short form electron configuration of ruthenium is [Kr]4d75s1, according to Hund's Rule, use "↑"or"↓" to correctly fill the following diagram. [Kr]
↑, ↑↓, ↑↓, ↑, ↑, ↑
