Chemistry Review

2. two or more atoms of the same element and atomic number but have different neutrons and mass numbers
5. contains protons and neutrons
7. electrons on the outermost (last) ring
9. negatively charged particle in the atom
11. the number that identifies the element and is equal to number of protons
13. neutrally charged particle in the atom
14. name of the atomic model discovered by Niel's Bohr
16. a type of element that is a poor conductor of electricity, are shiny or dull and are often brittle

1. chart that shows all the elements
3. where electrons are held in the atom
4. the sum of the neutrons and protons in the atom
6. a set of elements in the same vertical column (family)
8. positively charged particle in the atom
10. a set of elements in the same horizontal row
12. a type of element that is a poor conductor of electricity, solid or liquid or gas at room temperature
15. a type of element that is a good conductor of electricity, ductile and malleable, and shiny
17. contains protons, neutrons, and electrons