Chemistry

7. A process in which substances undergo a transformation to create new substances with different properties.
8. A group of elements that are generally not shiny, poor conductors of heat and electricity, and often found in a gaseous or brittle solid state.
9. A substance composed of two or more different types of atoms chemically bonded together in a fixed ratio.
11. A substance composed of only one type of atom, and it cannot be broken down into simpler substances by chemical means.
12. A group of atoms bonded together.
14. A neutrally charged subatomic particle found in the nucleus of an atom.
15. A combination of different substances that are not chemically bonded, and their properties can vary based on the proportions of each component.

1. A substance that consists of only one type of particle, either a single element or a single compound.
2. The path followed by electrons as they move around the nucleus of an atom.
3. The smallest unit of matter.
4. The central, positively charged part of an atom, containing protons and neutrons.
5. Elements with properties that fall between metals and non-metals, also known as metalloids.
6. A positively charged subatomic particle found in the nucleus of an atom.
10. A group of elements that are typically shiny, good conductors of heat and electricity, and often malleable and ductile.
11. A negatively charged subatomic particle that orbits the nucleus of an atom.
12. Anything that has mass and takes up space.
13. A representation of a chemical reaction using symbols and formulas, typically showing the reactants and products involved in the process.