The Periodic Table
Across
- 2. the number of groups on the periodic table
- 6. the second person to make a periodic table and organized the elements by atomic number
- 11. the elements in Group 2 of the periodic table (beryllium, magnesium, calcium, strontium, barium, and radium)
- 12. an atom, radical, or molecule that has or lost one or more electrons and has a negative or positive charge
- 14. glucose and chlorophyll are examples of ___________
- 17. a vertical column of elements in the periodic table; they share chemical properties
- 19. the elements in Group 1 of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium)
- 21. groups of similar elements that go vertically by columns; there are 18 of them
- 22. the element that has only the element that has one proton and one electron and it does not behave like any other element
Down
- 1. the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
- 3. elements in group 1 form ____________ ions
- 4. a horizontal row of elements in the periodic table
- 5. the elements in Group 17 of the periodic table (fluorine, chlorine, bromine, iodine, and astatine);they combine with most metals to from salts
- 7. metals that can use the inner shell before using the outer shell to bond; all positive
- 8. loosing and gaining electrons
- 9. an element that conducts heat and electricity poorly and that does not form positive ions in an electrolytic solution
- 10. an element or compound that conducts electric current better than an insulator does but not as well as a conductor does
- 13. the elements in Group 18 of the periodic table (helium, neon, argon, krypton, xenon, and radon);they are nonreactive because they are stable
- 14. the name of group 14
- 15. elements in group 17 form _____________ ions
- 16. number of periods on the periodic table
- 18. an element that is shiny and that conducts heat and electricity well
- 20. the man who created the first periodic table of elements in 1869 and arranged the elements by atomic mass