Electronic Configuration
Chemistry ⇒ Atomic Structure and the Periodic Table
Electronic Configuration starts at 8 and continues till grade 12.
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A certain element has the electronic configuration [Ne] 3s2 3p4. What is its group number in the modern periodic table?
Describe the difference between the electronic configuration of a neutral atom and its cation.
Explain Hund's Rule and its significance in electronic configuration.
Explain why copper (Cu) has an anomalous electronic configuration.
Explain why the electronic configuration of chromium (Cr) is [Ar] 4s1 3d5 instead of [Ar] 4s2 3d4.
How many electrons are present in the valence shell of phosphorus (atomic number 15)?
How many unpaired electrons are present in the ground state of a nitrogen atom (atomic number 7)?
A certain element has the electronic configuration [Ne] 3s2 3p4. What is its group number in the modern periodic table?
Which of the following elements has a half-filled p-subshell in its ground state?
(1) Nitrogen
(2) Oxygen
(3) Fluorine
(4) Neon
Which of the following elements has the electronic configuration 1s2 2s2 2p6 3s2 3p6 4s1?
(1) Potassium
(2) Calcium
(3) Sodium
(4) Magnesium
Which of the following ions has the same electronic configuration as neon?
(1) Na+
(2) F-
(3) O2-
(4) All of the above
Which of the following is NOT a valid electronic configuration?
(1) 1s2 2s2 2p6 3s2 3p6 4s2 3d10
(2) 1s2 2s2 2p6 3s2 3p7
(3) 1s2 2s2 2p6 3s2 3p6 4s1
(4) 1s2 2s2 2p6 3s2 3p6 4s2 3d5
Fill in the blank: The electronic configuration of an atom is based on the order of increasing ______ of the orbitals.
Fill in the blank: The electronic configuration of K+ is ______.
Fill in the blank: The electronic configuration of Mg2+ is ______.
Fill in the blank: The maximum number of electrons that can occupy a p-subshell is ______.
True or False: The 3d subshell is filled before the 4s subshell.
True or False: The 4s orbital is filled before the 3d orbital when writing electronic configurations.
True or False: The electronic configuration of an atom can be used to predict its position in the periodic table.
True or False: The electronic configuration of an atom determines its chemical properties.
