Elements

3. A property found in metals, referring to how reflective a substance is.
5. The elements found along the stair-step line that distinguishes metals from non-metals.
8. A group of elements consisting of nonreactive gases such as Helium and Neon.
12. The element with the symbol Au.
16. Capable of being shaped or formed, as by hammering or pressure.
17. a compound particle made up of different types of atoms bonded together.
18. The element with the symbol O.
20. A positively charged particle found in the nucleus of an atom.

1. Elements which have luster, malleability, and are conductive.
2. A cluster of elements found on the same row in the periodic table.
4. The term that refers to the number of protons in an atom's nucleus.
6. The ability or power to transmit heat, electricity, or sound.
7. The basic unit of matter, consisting of a dense central nucleus surrounded by electrons.
9. A cluster of elements found on the same row in the periodic table.
10. The element with the symbol Ag.
11. The Russian scientist who first organized the periodic table of elements in 1869.
13. The mass of an atom usually expressed in atomic mass units.
14. A substance formed when two or more chemical elements are chemically bonded together.
15. A negatively charged particle surrounding the nucleus of an atom.
19. The element with the symbol Fe.