Across
- 3. Hydrogen is located in period ______ of the periodic table.
- 5. In the modern periodic table, elements are arranged according to their _______ number
- 8. The atomic number equals number of ________ in an atom.
- 10. Cu
- 12. Person who wrote the first periodic table
- 14. Elements in Groups 3-12 are called _________ metals.
- 16. What state of matter are carbon, lead, and aluminum?
- 17. A substance with unique properties that is composed of only 1 type of atom is called a(n) _______
- 19. Columns of the Periodic Table
Down
- 1. Element with 20 protons
- 2. Most abundant element in air
- 4. He, Ne, Ar, Kr, Xe, Rn are ________ gases
- 6. Alkaline Earth Metals have how many valence electrons
- 7. An element is a substance composed of a single kind of _______
- 9. Chlorine has _______ number of neutrons
- 11. Rows of the Periodic Table
- 13. Element with an atomic number of 47
- 15. Shiny, highly conducting solids such as sodium, tin, and lead
- 18. The symbol for the element Mercury is ______