Parts of an atom

4. a small, positively charged particle in the nucleus of the atom
8. a tiny, negatively charged particle that moves around the nucleus of an atom
9. the electrons in the outermost electron level or orbital of the electron
10. the columns going down the periodic table
13. a small partial in the nucleus of the, with no electrical charge
15. the smallest component of an element having the same properties of the element

1. arrangement of chemical elements according to atomic number
2. the set of characters that is used to identify an element
3. two or more elements that contain the same number of protons but different number of neutrons
5. a combination of two or more atoms that are bonded together
6. the rows going across the periodic table
7. a substance of two or more elements
11. region of space around the nucleus where an electron is likely to be found
12. a charged atom, with more electrons than neutrons
14. the central core an atom containing protons usually neutrons