Section I: Circle the correct answer: (60 pts 1. Electrons filling up the orbitals from low to high is known as (the) a. Hund\'s rule b. Pauli exclusion principle c. Aufbau principle. d. Heisenberg uncertainty principle 2. Which of the following statements is TRUB?r a. An orbital that penetrates into the region occupied by core electrons is more shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy. b. An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy. c. It is possible for two electrons in the same atom to have identical values for all four quantum numbers. d. Two electrons in the same orbital can have the same spin. e. None of the above is true. 3. Give the ground state electron configuration for Sr a. [Kr)5s24d2 b. [Krj5s24d10Sp2 c. [Kr]5s24d10 d. [Krj5s25d105p2 e. [Krj5s2 4. Choose the ground state electron configuration for Zn2 a. [Ar] b.[Ar3d10 c. Ar]4s23d6 d. [Arj4s23d8 e. [Ar]3d8
Solution
Answer 1): c) Aufbau principle
It states that the lower energy orbitals are filled before the higher energy.
.
Measures of Central Tendency: Mean, Median and Mode
Electron Configuration and Orbital Filling Principles
1. Section I: Circle the correct answer: (60 pts 1. Electrons filling up the orbitals from low to high
is known as (the) a. Hund's rule b. Pauli exclusion principle c. Aufbau principle. d. Heisenberg
uncertainty principle 2. Which of the following statements is TRUB?r a. An orbital that
penetrates into the region occupied by core electrons is more shielded from nuclear charge than
an orbital that does not penetrate and therefore has a lower energy. b. An orbital that penetrates
into the region occupied by core electrons is less shielded from nuclear charge than an orbital
that does not penetrate and therefore has a lower energy. c. It is possible for two electrons in the
same atom to have identical values for all four quantum numbers. d. Two electrons in the same
orbital can have the same spin. e. None of the above is true. 3. Give the ground state electron
configuration for Sr a. [Kr)5s24d2 b. [Krj5s24d10Sp2 c. [Kr]5s24d10 d. [Krj5s25d105p2 e.
[Krj5s2 4. Choose the ground state electron configuration for Zn2 a. [Ar] b.[Ar3d10 c.
Ar]4s23d6 d. [Arj4s23d8 e. [Ar]3d8
Solution
Answer 1): c) Aufbau principle
It states that the lower energy orbitals are filled before the higher energy.
![Section I: Circle the correct answer: (60 pts 1. Electrons filling up the orbitals from low to high
is known as (the) a. Hund's rule b. Pauli exclusion principle c. Aufbau principle. d. Heisenberg
uncertainty principle 2. Which of the following statements is TRUB?r a. An orbital that
penetrates into the region occupied by core electrons is more shielded from nuclear charge than
an orbital that does not penetrate and therefore has a lower energy. b. An orbital that penetrates
into the region occupied by core electrons is less shielded from nuclear charge than an orbital
that does not penetrate and therefore has a lower energy. c. It is possible for two electrons in the
same atom to have identical values for all four quantum numbers. d. Two electrons in the same
orbital can have the same spin. e. None of the above is true. 3. Give the ground state electron
configuration for Sr a. [Kr)5s24d2 b. [Krj5s24d10Sp2 c. [Kr]5s24d10 d. [Krj5s25d105p2 e.
[Krj5s2 4. Choose the ground state electron configuration for Zn2 a. [Ar] b.[Ar3d10 c.
Ar]4s23d6 d. [Arj4s23d8 e. [Ar]3d8
Solution
Answer 1): c) Aufbau principle
It states that the lower energy orbitals are filled before the higher energy.](https://image.slidesharecdn.com/sectioni-circlethecorrectanswer-60pts1-electronsfillingup-230201031551-e2c4090b/85/Section-I-Circle-the-correct-answer-60-pts-1-Electrons-filling-up-docx-1-320.jpg)
