chemistry vocabulary

3. a positively charged region at the center of the atom
4. a one- or two-letter abbreviation for a chemical element name.
5. a subatomic particle found in the nucleus of every atom except that of simple hydrogen.
6. smallest building blocks of matter and make up everything around us
7. one basic substances.made of atoms only one kind and that cannot be separated by ordinary chemical means into simpler substances
10. a subatomic particle found in the nucleus of every atom with a positive charge
13. When an object has more electrons than protons
14. an element that form positive ions and has metallic bonds.
16. negatively charged subatomic particle that can be either bound to an atom or free (not bound).
17. organizes all discovered chemical elements in rows

1. quantity of matter contained in an atom of an element
2. chemical element and its compounds in the natural state or the result of a manufacturing process
4. very small partical that is a building block for atom
6. the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus
8. group of electrons circulating around a nucleus or a molecule.
9. a chemical element that generally lacks a predominance of metallic properties
10. occurs when an atom has more protons than electrons
11. an element that has properties that are intermediate between those of metals and nonmetals.
12. process that takes place when a substance (or substances) are brought into contact with each other and produce a new substance(s)
15. level An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be.