Across
- 3. a chemical reaction that absorbs heat
- 5. substance that does the dissolving in a chemical solution
- 9. chemical bond between atoms caused by an electrostatic force in opposite charged ions
- 12. expression which states the number and types of atoms in a molecule
- 13. part of the atomic nucleus that has a charge of +1
- 14. chemical species formed when two or more elements form a chemical bond
- 15. a substance that cannot be subdivided and is identified by the number of protons in its atoms
- 16. chemical mass unit equal to Avogadro's number
- 20. any element found in the last column of the periodic table
- 21. part of the atomic nucleus that has a charge of -1
- 22. whole number that is the sum of protons and neutrons in the atomic nucleus
- 24. outer electron that is most likely to participate in a bond formation or a chemical reaction
- 25. part of the atomic nucleus that has a charge of 0
- 26. measure of hydrogen ion in a solution showing the acidity or basicity of a substance
- 27. a chemical species that accepts protons
- 28. chemical bond between atoms where electrons are more or less evenly shared
Down
- 1. a chemical reaction that releases heat
- 2. the arrangement of elements by increase of their atomic number
- 4. homogenous mixture of two or more substances
- 6. atoms that have the same number of protons but different amount of neutrons changing its atomic weight
- 7. the number of protons in the nucleus of an atom of an element
- 8. a chemical species that donates protons
- 10. any element found in the 1st column of the periodic table
- 11. substance that is dissolved in a chemical solution
- 17. substance formed as a result of a chemical reaction
- 18. starting material for a chemical reaction
- 19. any element found in the 2nd column of the periodic table
- 23. the ability to do work