SCIENCE

3. The smallest particle of a chemical element that can exist.
7. A substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).
8. A substance that flows freely but is of constant volume, having a consistency like that of water or oil.
10. a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
14. a thing or person that is the result of an action or process.
15. A thing that is composed of two or more separate elements; a mixture.
17. a substance that takes part in and undergoes change during a reaction.
18. A strong, hard magnetic silvery-grey metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel.
19. Physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.

1. A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
2. A substance made by mixing other substances together.
4. Firm and stable in shape; not liquid or fluid.
5. relating to things perceived through the senses as opposed to the mind; tangible or concrete.
6. relating to chemistry, or the interactions of substances as studied in chemistry.
9. Something in side a pencil
10. A tiny portion of matter.
11. The spreading of something more widely.
12. The chemical element of atomic number 13, a light silvery-grey metal.
13. The chemical element of atomic number 30, a silvery-white metal that is a constituent of brass and is used for coating (galvanizing) iron and steel to protect against corrosion.
16. The chemical element of atomic number 20, a soft grey metal.