Question 1

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

Accepted Answer

Electrons fill the lowest energy orbitals first before moving to higher energy orbitals.

Question 2

What is the condensed electron configuration for phosphorus (Z = 15)?

Accepted Answer

Ne[3s23p3]

Question 3

Which element in Group 7A has the highest electronegativity?

Accepted Answer

Cl

Question 4

According to the octet rule, how many electrons does oxygen aim to have in its valence shell when forming compounds?

Accepted Answer

8

Question 5

In the molecule $$H_{3}$$COH, how many valence and shared electrons does the oxygen atom possess?

Accepted Answer

6 valence electrons and 2 shared electrons

Question 6

What is the formal charge on the nitrogen atom in the ammonia molecule (NH3)?

Accepted Answer

0

Question 7

When drawing Lewis Dot Structures, which element should never be placed in the center of the molecule?

Accepted Answer

Hydrogen

Question 8

How many resonance structures are possible for the nitrate ion (NO3-)?

Accepted Answer

3

Question 9

What is the hybridization and number of unhybridized orbitals for the central atom in HCN?

Accepted Answer

sp hybridization, 2 unhybridized orbitals

Question 10

Is nitrogen trifluoride (NF_{3}) a polar or nonpolar molecule?

Accepted Answer

Polar

Question 11

Which functional group is present in the following structure: $$CH_{3}$$COOH?

Accepted Answer

Carboxylic acid

Question 12

Which of the following molecules is both organic and a hydrocarbon?

Accepted Answer

CH4

Question 13

What is the atomic number of an atom with 6 protons, 6 neutrons, and 6 electrons?

Accepted Answer

6

Question 14

Which principle is being violated in the electron configuration diagram where two electrons occupy the same orbital with parallel spins?

Accepted Answer

Pauli Exclusion Principle

Question 15

What is the mass number of a carbon atom with 6 protons and 8 neutrons?

Accepted Answer

14

Question 16

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same atomic number but different mass numbers.

Question 17

Which of the following is true about resonance structures?

Accepted Answer

Resonance structures differ only in the arrangement of electrons.

Question 18

What is the formal charge on the carbon atom in the thiocyanate ion (SCN-)?

Accepted Answer

0

Question 19

Which of the following molecules is nonpolar?

Accepted Answer

CO2

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Study Guide - Practice Questions