Question 1

Which of the following statements best describes the Aufbau Principle in electron configuration?

Accepted Answer

Electrons fill orbitals in order of increasing energy, starting from the lowest energy level.

Question 2

Given the electron configuration for carbon: $$1s^2$$ $$2s^2$$ $$2p^2$$, how many valence electrons does carbon have?

Accepted Answer

4

Question 3

Which of the following pairs of elements will form a bond with the greatest ionic character?

Accepted Answer

Sodium and Chlorine

Question 4

What is the formal charge on the oxygen atom in the hydroxide ion ($$OH^-$$)?

Accepted Answer

$$-1$$

Question 5

Which of the following molecules contains a polar covalent bond?

Accepted Answer

$$H_2O$$

Question 6

According to the Lewis model, how many electrons are shared in a double bond?

Accepted Answer

4

Question 7

Which of the following best explains why fluorine is the most electronegative element?

Accepted Answer

It has the highest effective nuclear charge and smallest atomic radius.

Question 8

What is the geometry and bond angle of methane ($$CH_4$$)?

Accepted Answer

Tetrahedral, $$109.5^\circ$$

Question 9

Which of the following is the correct Lewis dot structure for carbon?

Accepted Answer

A carbon atom with 4 dots

Question 10

Which of the following bonds is classified as nonpolar covalent?

Accepted Answer

$$N-N$$

Question 11

What is the correct condensed structural formula for ethanol?

Accepted Answer

$$CH_3CH_2OH$$

Question 12

Which of the following functional groups is present in acetic acid?

Accepted Answer

Carboxylic acid

Question 13

Which statement about the Pauli Exclusion Principle is correct?

Accepted Answer

No two electrons in an atom can have the same set of four quantum numbers.

Question 14

Which of the following molecules has a linear geometry?

Accepted Answer

$$CO_2$$

Question 15

What is the formal charge on the central carbon atom in $$CO_2$$?

Accepted Answer

$$0$$

Question 16

Which of the following is a secondary amine?

Accepted Answer

Dimethylamine ($$CH_3NHCH_3)$$

Question 17

Which of the following best describes a dative (coordinate) bond?

Accepted Answer

A bond formed when one atom donates both electrons to the bond.

Question 18

Which of the following molecules contains a carboxyl group?

Accepted Answer

$$CH_3COOH$$

Question 19

Which of the following statements about electron affinity is correct?

Accepted Answer

Electron affinity is the energy released when an electron is added to an atom.

Question 20

Which of the following best explains why atoms form chemical bonds?

Accepted Answer

To achieve a stable electron configuration similar to noble gases.

Fundamentals of Organic Chemistry: Atomic Structure, Bonding, and Functional Groups (Chapter 1)

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