Across
- 5. This non-metal is liquid, in period 5, has the atomic number of 35 and it’s symbol is “Br”.
- 6. This element is a member of the alkaline earth metals and is in period 3. It has 2 electrons in its valence shell.
- 7. This is the simplest form of matter that cannot be further broken down. The periodic table is used in order to classify this form of matter. An example would be hydrogen.
- 9. These type of metals are located in the first group of the periodic table. They contain one electron in their valence shell.
- 10. This is given to element and is an abbreviation for it. For example, Hydrogen’s ______ is “H”
- 11. This is the table’s 18 columns that are read vertically from top to bottom. All of these elements in each _____ have the same number of electrons orbiting the nucleus in the outermost shell.
- 12. This family of elements are located in the middle of the periodic table. The number of valence electrons for these elements vary. They are very hard and have high melting and boiling points. An example of a metal from this family would be copper.
- 15. This is the number of protons in the nucleus of the atom, which determines the chemical properties of an element and it's place on the periodic table.
- 18. They are located along the "stair case" between the metals and nonmetals. They possess some characteristics of metals and some of nonmetals.
- 19. These are the seven rows in the periodic table. Each element in a single row has the same number of electron shells which surround the atomic nucleus.
Down
- 1. The symbol for this element is “H”. It has one electron in its valence shell and the atomic number of 1. It is a colorless, odorless combustible gas. 75% of the universe’s elemental mass is this element.
- 2. They are located on the left side and the middle of the periodic table. They are shiny, malleable and ductile.
- 3. This is the total mass of protons, neutrons and electrons in a single atom.
- 4. The elements in this family is relatively nonreactive. This is because they have a complete valence shell.
- 8. This alkali metal has the atomic number of 19 and is in period 4. The symbol for this element is “K”.
- 9. They are the elements located in group two of the periodic table.They contain two electrons in their valence shell.
- 13. They are located on the upper right side of the periodic table, above the "stair case". They are poor thermal and electrical conductors and are brittle solids.
- 14. This element is a gas that we use every day in order to survive. It is also found in the molecular compound of water and has the atomic number of 8.
- 16. This element is a member of the noble gases and is in period 2. It has a full valence shell and has the atomic mass of 20.18.
- 17. This family of non-metals are located in group 7 of the periodic table.These reactive nonmetals have seven valence electrons. They are highly reactive, especially with alkali metals and alkaline earths.