Which of the following is the correct ground-state electron configuration for a neutral atom of Cobalt (Co, Z=27)?

An element has the ground-state electron configuration [Kr] 5s2 4d10 5p3. Which of the following identifies the element and the number of unpaired electrons in its ground state?

Which of the following rules is violated if an electron configuration for a ground-state Carbon atom is written as 1s2 2s2 2p2 with both 2p electrons sharing the same m_l orbital and having opposite spins?

Which of the following ground-state ions is isoelectronic with Argon?

A half-filled d-subshell offers increased stability.

The configuration 1s2 2s2 2p6 3s2 3p6 4s1 3d5 represents the ground state of Chromium (Cr). Which statement best justifies this 'exception' to the predicted Aufbau order?

In the photoelectron spectrum of Phosphorus, which subshell corresponds to the peak with the highest binding energy?

Which of the following represents the correct ground-state electron configuration for the Fe3+ ion?

Which of the following quantum number sets (n, l, ml, ms) is not possible for an electron in a ground-state Nitrogen atom?

Which element has the following ground-state electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5?

What is the total number of s-electrons in a neutral ground-state atom of Arsenic (As, Z=33)?

English

Practice identifying ground-state electron configurations using the Aufbau principle, Hund's rule, and the Pauli exclusion principle.

Knowunity

United States of America

AP Chemistry

Introduction to Electron Configuration

Analyze the ecological and economic motivations behind the initial transfer of goods, people, and diseases between the Old and New Worlds.

AP US History

Origins and Dynamics of the Columbian Exchange

Analyze the initial social and religious encounters between Europeans, Africans, and Indigenous peoples in the colonial Americas.

Introduction to Early Cultural Interactions

Analyze the environmental factors and technological innovations that led to the rise of early states in Mesopotamia, Egypt, and the Indus Valley.

AP World History

Origins of Ancient River Civilizations

Analyze the economic, religious, and political factors that drove European powers to the Americas during the 15th and 16th centuries.

Motivations for European Exploration

Examine the diverse social, political, and economic structures of North American indigenous groups prior to European contact.

Introduction to Native American Societies

Practice identifying the essential elements including carbon, nitrogen, phosphorus, and sulfur that compose biological macromolecules.

AP Biology

Introduction to Biological Elements of Life

Explore the fundamental economic and social structures of the Spanish colonial system, focusing on the encomienda and the casta social hierarchy.

Introduction to the Spanish Encomienda System

Analyze the political and cultural transitions from the Roman Empire to the Byzantine Empire, focusing on the reign of Justinian I and his code.

Origins and Continuity of the Byzantine Empire

Practice identifying the motivations for a weak central government and the specific powers granted to the states under the first U.S. constitution.

AP US Government & Politics

Origins of the Articles of Confederation

Practice the core principles of the APA ethical code including informed consent, debriefing, and the role of Institutional Review Boards.

AP Psychology

Foundations of Ethical Guidelines in Research

Practice fundamental concepts of mass percentage and the law of definite proportions to determine the relative mass of elements in a pure substance.

Introduction to Elemental Composition

Practice converting between mass, moles, and number of particles using Avogadro's constant and the fundamental concept of the mole.

Introduction to Moles and Avogadro's Number

dives pretty deeply into each unit of the ap chem curriculum 

Study guide

Jocie

units 1-9 ap chem

Study note

koiu

Heat Transfer and Thermal Equilibrium 

Alkanes-Definition and Explanation. Types of Alkanes and General Formula of Alkanes

Presentation

Meru Evergarden

DEFAULT

Chemistry

General Chemistry Notes-Alkanes

Covers matter, mass, weight, and the classification of matter.

Erina

What is chemistry?

Understand how to solve stoichiometry problems.

Miranda M.

Stoichiometry notes

Violet P

AP Chem Units 3-5

Understanding the dynamic nature of reversible reactions and the concept of chemical equilibrium, as well as calculating the equilibrium constant for reactions.

Introduction to Electron Configuration

Kartičky

Introduction to Electron Configuration

Kartičky