Periodic table

1. a vertical column of elements in the periodic table
3. Jimmy from Nickelodeon or a neutral subatomic particle in the nucleus of an atom
10. an element that does not conduct electricity or heat and is usually a gas at room temperature
11. electrons that are located in the outermost energy level of an atom.
13. he elements thta are good conductors of heat and electricity
15. the smallest unit of a compound that has all of the properties of the compound
16. A pure substance that is made up of only one kind of atom
17. an atom that has gained or lost one or more electrons
18. elements that have properties of metals and nonmetals
19. a negatively charged subatomic particle found in the energy level of an atom

2. The positively charged particle of the nucleus
4. describes how likely an element is to form bonds with other elements
5. horizontal row of elements in the Periodic table
6. any atoms having the same number of protons but a different number of neutrons
7. any of the possible energies an electron may have in an atom
8. the center of an atom that are made up of protons and neutrons
9. states that there is a periodic repetition of chemical and physical properties of the elements when they are arranged by increasing atomic number
12. number of protons in the nucleus of an atom
13. anything that has mass and volume
14. the smallest particle that has the properties of an element