Atom Crossword Puzzle

4. table, Chart showing every element and its atomic mass/number
6. mass, the mass of a chemical element expressed in atomic mass units
9. a sub atomic particle with neutral charge
11. Levels, shells around the nucleus that hold electrons
13. Element, any of the 118 known elements on the periodic table
14. electron, an electron in the outermost shell that can combine with other atoms and form molecules
16. the center of an atom containing protons and neutrons
17. the science of matter dealing with the composition of substances and their properties
18. a sub atomic particle with positive charge
19. Bohr, Danish physicist who created the Bohr Model

1. the basic unit of a chemical element
2. Model, a basic model of the atom created by Niels Bohr and Ernest Rutherford
3. shell, the outermost shell of the atom
5. a subatomic particle with negative charge
7. anything that has mass and takes up space
8. smaller than an atoms dimensions
10. Particle, a body with a certain amount of mass but no dimensions
11. Charge, the quantity of unbalanced electricity in a body shown as electrons
12. Rutherford, British physicist who discovered the atomic nucleus and helped create the Bohr Model
15. number, the number of protons in an atom, which determines it's spot on the periodic table