science puzzle

3. How their atoms are arranged, connected, and the atoms that are used.
5. a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes.
6. Filters. A redistribution of atoms or atomic groups within a molecule, forming the molecule of a different substance.
7. of matter include any traits that can be measured, such as an object's density, colour, mass, volume, length
9. a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition
11. is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components without breaking chemical bonds.
12. is a substance that is formed as the result of a chemical reaction.
13. An ordered system of numbering or indexing that is used as a reference standard in measurement, in which each number corresponds to some physical quantity.
15. refers to a substance that has the power to cause irreversible damage or destroy another substance by contact
16. is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

1. ,tells us the number of atoms of each element in a compound. It contains the symbols
2. ,smallest unit into which matter can be divided
4. is a process in which one or more substances, also called reactants, are converted to one or more
8. temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapor of the liquid
10. re compounds or mixtures delivered as solids, liquids or gases, that supply essential nutrients to crops in soluble forms that are convenient and safe
14. at which the solid and liquid forms of a pure substance can exist in equilibrium.