WorksheetsPre UPS 2_ Chemical equation & electronic configuration
Total questions: 17
Worksheet time: 13mins
Identify the rule that is being violated
Aufbau's Principle
Hund's Rule
Pauli's 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.
All orbitals of equal energy (degenerate orbitals) are occupied by one electron before any single orbital is occupied by a second electron.
Aufbau Principle
Pauli's Exclusion Principle
Hund’s Rule
Core Notation
No two electrons in the same atom can have the same four quantum numbers.
Aufbau Principle
Pauli's Exclusion Principle
Hund’s Rule
Noble gas notation
The electron configuration of an atom is 1s22s22p3.
The total number of electrons in the atom is
3
4
5
7
According to Aufbau Principle, electrons are filled into 4s orbital before 3d orbital.
When removing the electrons, the electron needs to be removed from which sub-shell first?
4s
3d
3p
1s
What is the oxidation number of carbon in the carbonate ion (CO₃²⁻)?
+4
+2
0
-2
When the following equation is balanced, the coefficient of H₂O is _____.
1
2
3
5
The limiting reactant in a chemical reaction is one that;
has the smallest molar mass
has the smallest coefficient
is in excess
is consumed completely
When does a chemical reaction stop?
When the excess reactant is used up
When the limiting reactant is used up
When all reactants are used up
Chemical reactions never stop
There are __________ orbitals in the second shell.
9
4
5
16
How many quantum numbers are necessary to designate a particular electron in an atom __________?
3
4
2
1
Which of the following is a valid set of four quantum numbers (n,l,m,s)?
(2, 1, 0, +1/2)
(2, 2, +1, -1/2)
(1, 0, +1, +1/2)
(2, 1, +2, +1/2)
Which of the following statements is true about the 3s and the 4s orbitals?
These orbitals have the same energy
These orbitals hold different amounts of electrons
These orbitals are the same distance from the nucleus
These orbitals have the same shape
If a chemist calculates the amount of product that could be obtained in a chemical reaction using stoichiometry, he or she is calculating the
theoretical yield
mole ratio
actual yield
percentage yield
Percent yield=(________)÷(________)×100%
