Chemistry Vocab

4. These Properties can be observed or measured without changing the composition of the matter. Examples include color, odor, density, malleability or viscosity.
11. Located outside the nucleus of an atom with a negative charge.
13. A pure substance. All the atoms of an element have the same number of protons, neutrons and electrons.
15. The total mass of the products must be equal to the total mass of the reactants in a chemical reaction. Matter is neither created nor destroyed.
16. Materials that react with each other in the beginning of a chemical reaction.
17. New material formed during a chemical reaction. Appears to the right of the arrow.
18. A bond formed when valence electrons of one atom are permanently transferred to another atom.
20. These properties can only be observed during a chemical reaction and thus changes the element's chemical composition. Examples include reactivity, flammability and corrosion.
21. A chemical bond formed when electrons are shared between two or more atoms.

1. Method of finding the density of irregularly shaped objects by displacing water in a container.
2. Table Arrangement of the elements into rows and columns by increasing atomic number.
3. A group of atoms bonded together. Can be element or a compound.
5. The center of an atom containing the protons and neutrons.
6. Regions surrounding the nucleus of an atom containing a certain number of electrons.
7. Electrons in the outermost energy level of an atom.
8. Anything that takes up space and has mass.
9. The building blocks of matter. Made up of protons, neutrons and electrons.
10. Physical property that tells you how tightly packed the molecules are in the object. Formula is d = m/v.
12. Located in the nucleus of an atom with no charge (neutral).
14. Located in the nucleus of an atom with a positive charge.
19. A substance made up of two or more different chemical elements.