Periodic Table Project

4. the process by which a substance changes directly from its solid state to its gas state without becoming a liquid.
8. the number of protons in an atom
9. an element that has properties of both metals and nonmetals.
12. a graphic organizer of all of the elements arranged by atomic number, that shows the patterns in their properties.
14. the central region of an atom that contains the protons and neutrons.
15. a solid mixture composed of metals and one or more substances
16. anything that has mass and takes up space.
17. mass the average mass of the atoms of that element
19. a substance that cannot be broken down into a simpler substance by ordinary chemical changes; only consist of one type of atom.

1. the spontaneous breakdown and emission of radiation in the form of particles or high energy photons
2. the smallest particle of an element that has the chemical properties of that element
3. the total number of protons and neutrons in the nucleus of an atom
5. a horizontal row in the periodic table
6. a vertical column in the periodic table of the elements; these elements have similar properties.
7. a group of atoms that are held together by covalent bonds.
10. a particle located in the nucleus of an atom that has no charge.
11. an element that tends to be dull, brittle, and is not a good conductor of electricity and heat.
13. a negatively charged particle located outside of the atom’s nucleus
18. a substance made up of two or more different types of atoms bonded together