Chemistry Vocabulary

2. last name of the person who discovered protons and neutrons in the nucleus
3. the small, dense region consisting of protons and neutrons at the center of an atom
5. advanced Democritus ideas by using experimental methods
6. a material made up of two or more different chemical substance or substances which are not chemically combined
7. an atom, particle, or molecule with a net electrical charge
8. how tightly or loosely packed a substance is
10. has a positive charge; found inside the nucleus of an atom
13. substance composed of atoms of 2+ atoms of the same/or different element
18. the closeness of a result to the true value
19. retains it's own properties
20. to the closeness of two or more measurements to each other
22. study of separation, identification, and composition of materials
25. bonded collection of two or more atoms
26. anything that occupies space and has mass

1. the study of materials and processes in living things
3. has no charge; inside nucleus of an atom
4. substance composed of only one type of atom
7. the study of other substances besides carbon compounds
9. the amount of 3D space a substance or object occupies
11. measures the mass of an object when that object is placed on it
12. the study of C & H (carbon & hydrogen) compounds and their derivatives
14. the study of physical characteristics of substances and the mechanisms of their reactions in relation to energy
15. a measure of the amount of matter that an object contains
16. a collection of quantitative or numerical data that describes a property of an object or event
17. an atom that has the same number of protons but a different number of electrons
21. floats around the nucleus of an atom; has a negative charge
23. last name of the person who discovered electrons
24. the smallest particle of an element that retains its identity in a chemical reaction