Matter

1. The types of elements that make up a substance.
3. A structure whose subunits occur in a constant ratio and are arranged in a repeating pattern.
4. A type of test that medical scientists perform to assess a medicine's effectiveness.
7. A unique particle of matter that is a fundamental building block of matter.
8. Data that can be used to support a scientific claim or argument.
9. The mass of a single atom.
12. The requirements that must be met for an engineering solution to be successful.
14. A solid structure whose atoms or molecules are arranged in a repeating three-dimensional pattern.
15. A representation of an object which makes important aspects easier to see.
17. An individua particle of an element.
18. Matter that has a constant chemical composition and characteristics.
22. On a scale that people can see with their eyes.
23. A property that describes the mass of a certain volume of matter.
24. A type of extended structure that is made of many smaller, repeating subunits in a chain.

2. The connection between atoms in more complex particles.
5. The specific way in which the bonds and atoms are arranged within the molecules of a substance.
6. A limitation on the range of possible solutions to a design.
10. A shorthand notation of one, two, or three letters that represent the name of the element.
11. A new substance that forms during a chemical reaction.
13. The process in which one or more new substances form from one or more other substances.
16. A substance that exists before a chemical reaction takes place and changes as a result of the reaction.
18. A property that describes how well one substance dissolves in another substance.
19. A group of two or more atoms that are held together by chemical bonds.
20. The amount of matter in an object or sample.
21. A characteristic of matter.