Atoms and the Periodic Table
Across
- 1. Elements with their outer energy level filled with electrons do not combine with other elements to form compounds.
- 3. The smallest piece of matter that still has chemical properties.
- 7. One of the 4 families of the Periodic Table with special names. Shiny metal. Highly reactive, reacts strongly with water to produce Hydrogen gas.
- 9. The number of protons in an element.
- 10. An atom with a positive or negative charged due to more or less electrons than the number of protons in the nucleus.
- 11. One of the 4 families of the Periodic Table with special names. Somewhat shiny metal. Fairly highly reactive, reacts moderately with water to produce Hydrogen gas.
- 15. A combination of 2 or more elements that are chemically combined.
- 19. One of the 3 major classifications of elements on the Periodic Table. Good conductors of heat and electricity, shiny, ductile and malleable.
- 21. The arrangement of elements on a table based on their atomic number and their properties.
- 22. Tells which elements are in a compound and their ratios.
- 23. One of the 4 families of the Periodic Table with special names. Mostly gases and liquids. Highly reactive, does not react with water.
- 24. The negatively charged particle in the electron cloud and a mass so small as to be insegnificant.
Down
- 2. The qualities of the elements that organize them on the periodic table.
- 4. Particles, like protons, neutrons, and electrons; that are smaller than the atom.
- 5. A column on the periodic table, also called a family, containing elements with the same number of valence electrons.
- 6. A horizontal row on the periodic table.
- 8. One of the 3 major classifications of elements on the Periodic Table. Have properties of both metals and nonmetals.
- 9. The measure of the mass of an element found by totaling the number of protons and neutrons.
- 12. An abbreviated, one or two letter symbol, used to write an element's name, beginning with a capital letter.
- 13. A particle in the nucleus with a neutral, or no, charge and a mass of 1 AMU.
- 14. A particle in the nucleus with a positive charge and a mass of 1 AMU.
- 16. One of the 4 families of the Periodic Table with special names. All gases. Completely unreactive in nature.
- 17. The tiny, dense, positively charged region in the center of an atom.
- 18. One of the 3 major classifications of elements on the Periodic Table. Not good conductors, dull colored and brittle.
- 20. One of a hundred or so pure substance that cannot be broken down into simpler substances