Challenging puzzle for experienced crossword solvers
Elemental Bonds and Reactions Quest
Moderate difficulty suitable for most players
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Across
- 1. Measure of hydrogen ion concentration in a solution
- 2. A group of atoms held together by chemical bonds
- 4. Atoms of the same element with different neutron counts
- 6. Homogeneous mixture of two or more substances
Down
- 3. Relating to the smallest unit of an element
- 5. Substance that speeds up a reaction without being consumed
- 7. Electrons in the outermost shell involved in bonding
- 8. Process that joins atoms together
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