Chemistry Crossword

3. Carbon, Oxygen, and Hydrogen must all be present in this reaction.
4. Covalent compounds have _____ bonds.
6. Most nonmetals that form ionic bonds have _____ to seven valence electrons.
7. __Al + 3O2 → 2Al2O3 (write it in word form).
8. these kinds of substances contain one type of atom.
9. If a solid responds in the same way from forces in all directions it can be classified as _______.
12. A type of homogeneous mixture that has microscopically dispersed particles between one to a thousand nanometers.
13. All solids are sorted into two categories: Crystalline and _____.
16. the center of the atom where protons and neutrons are found.
18. Pure substances include elements and _______.
21. In chemicals equations both sides must be balanced to achieve _______.
23. C2H4 + 3O2 → __CO2 + 2H2O (write it in word form).

1. Orange juice is an example of a ___________ mixture.
2. All solids get their characteristics from the arrangement of electrons, their chemical bonds, and their __________ bonds.
5. A type of mixture that is not uniform in terms of composition.
8. Melting ice cream is an example of this type of change.
10. Unexpected color change, release of energy, and unexpected temperature change are all _______ of a chemical change.
11. The atoms and molecules in amorphous solids are arranged ______.
14. 2H2 + O2 → 2H2O is an example of a _______ reaction.
15. Ionic compounds always have a crystal _______ structure.
17. A type of chemical bond formed when atoms share electrons.
19. These types of mixture are not evenly distributed and can be separated by a physical process.
20. Ionic compounds usually have _____ melting and boiling points.
21. An atom is mainly made out of _____ space.
22. _______ compounds are formed when the electrons from metals are transferred over to nonmetals.