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Collisions HE Content Areas

Radii Trends

Build a series of atoms of increasing radii by placing protons in the nucleus and electrons in atomic orbitals while discovering fill order.
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Ionization Energy

Form stable ions by attempting to add or remove electrons from any energy level while monitoring ionization energies.
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Acid Strength

Attempt to add and remove protons from acids and bases to create target ions and molecules while differentiating between strong and weak acids.
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Lewis Structures

Bond together atoms to create target molecules with unique bond polarities and molecular shapes.
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Ionic Bonding

Build ionic compounds of specific target ratios using monatomic and polyatomic ions of various charges.
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Latent Heat

Cause phase changes in target sequences by adding or removing energy to affect particle motion and to break and form intermolecular forces.
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LeChâtelier

Disturb reactions to shift equilibrium and cause changes in the system to match game targets.
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IMFs

Use single atoms or build molecules of target polarities to create IMFs.
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Implementing Collisions HE in the Higher Education Classroom

Introductory chemistry courses are well known to pose significant difficulty to many undergraduates. Multiple studies have demonstrated that these courses often have high failure rates …

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Reasons to register for Collisions HE

Collisions HE is an ideal instructional tool, as well as a learning and practice resource, for college and university students. Collisions HE is aligned to …

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Collisions study integration & usage scenarios

Collisions has been one of the best tools for teaching introductory chemistry topics that I have come across in a while. It helps students to …

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Important Notice

It is with regret that we inform you that Playmada has decided to cease operations. After June 30, 2022 we will no longer be able to provide customer support and training for Collisions.

As of July 1st, 2022, Collisions will remain available and free to all educators and students.

Unfortunately, email, phone or training support will not be available. Visit our user support forum at https://playmada.boards.net.

We welcome you to continue making the most of using Collisions for free in your classroom.

Thank you for your support.