The Elements

2. Salt forming
3. An organized arrangement of the elements created by Mendeleev
5. The negative charges in an atom
6. The ability of a object to transfer heat
9. The ability of an element to hammered or rolled into other shapes
10. Elements that have some properties of metals and some properties of nonmetals
11. A process in which the atomic nuclei of unstable isotopes release particles and energy
12. The positive charges in an atom
13. The particle in an atom with no charge
14. An abbreviation of an elements name using 1 or 2 letters
16. A molecule made up of 2 atoms
19. The center of an atom
20. Substances that can conduct electricity under some but not all conditions
23. The ability to spontaneously emit radiation
26. The ease and speed that a substance reacts with other substances

1. An element that has very few of the properties of a metal
4. The ability of an object to transfer electric current
7. Atoms that are the same element but have different numbers of neutrons
8. The smallest particle of an element
9. The sum of the protons and neutrons in an atom
15. A group of elements that conduct electric current and heat well
17. The gradual wearing away of a metal due to a chemical reaction
18. The amount of energy an electron has
21. The ability of a material to be pulled into a long wire
22. Radioactive isotopes that can be followed through the steps of a chemical reaction
24. The number of protons in an atom
25. The average mass of all the isotopes in an element