Chemistry

1. Substances formed by two or more different elements chemically bonded.
6. Processes where atoms and molecules rearrange, forming new substances.
8. Two or more atoms chemically bonded together.
9. The basic building blocks of elements, composed of protons, neutrons, and electrons.
11. The basic building block of elements,contains protons, neutrons and electrons
13. Forces that hold atoms and molecules together in compounds.

2. Sub-atomic particle that has a positive charge
3. Substances composed of two or more elements not chemically bonded.
4. Anything that has mass and takes up space, existing in solid, liquid, or gas states.
5. Sub-atomic particle that has a neutral charge
7. A chart that organizes elements by their atomic number and properties, helping scientists understand trends.
10. Substances that cannot be broken down into simpler substances. They are listed in the periodic table.
12. A scale measuring how acidic or basic a substance is in water.