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WorksheetsQUANTUM MECHANICAL MODEL
Total questions: 15
Worksheet time: 8mins
If the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom?
6
8
10
18
Which of the following sub-levels is correctly designated?
1p5
3f9
2p6
3d11
Each sub level has its maximum number of orbitals. How many orbitals are in the third principal energy level?
3
6
9
12
Which of the following main energy levels of an atom can accommodate a maximum of 18 electrons?
1st energy level
2nd energy level
3rd energy level
4th energy level
How many orbitals are present in the 4p sub level?
7
5
4
3
If the 1st energy level is already filled up with 2 electrons, what level should be filled up next?
Second
Third
Fourth
Fifth
According to Pauli Exclusion Principle, how many electrons may occupy a single orbital?
1
2
4
8
“An electron should occupy the lowest energy level first before the higher energy level” is stated in what rule?
Hund's rule
Pauli Exclusion Principle
Aufbau Principle
All of the above.
What rule states that single electrons must occupy each equal-energy orbital before additional electrons can occupy the same orbitals.
Hund's rule
Pauli Exclusion Principle
Aufbau Principle
None of the choices.
Which of the following statement is wrong?
Two electrons must occupy each equal energy orbital before additional electrons can occupy the same orbitals.
A maximum of two electrons may occupy the same orbitals.
In filling up orbitals, electron occupies the lowest energy orbital first before the higher energy orbitals.
None of the choices.
What is the electron configuration of Argon?
1s2 2s2 2p6
1s2 2s2 2p6 3s1
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s2 3p6
Which atom has an electron configuration of 1s2 2s2 2p6?
He
Ne
Ar
Xe
What is the electron configuration of Gallium, 31Ga?
1s2 2s2 2p6 3s2 3p5 4s2 3d10 4p1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1
1s2 2s2 2p6 3s2 3p6 4s2 3d9 4p2
1s2 2s2 2p6 3s2 3p5 4s2 3d10 4p2
Which one of the following electron configurations is INCORRECT?
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
1s2 2s2 2p6 3s2 3p6 4s2 3d9 4p2
Which of the following electron configurations is CORRECT?
1s2 2s3
1s2 2s2 2p6
1s2 2s2 3s2
1s2 2s2 2p6 3s2 4s2
