chemistry
Across
- 2. / are elements that have similar physical or chemical properties
- 6. / a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction
- 7. change / change occurs when the physical properties are changed, such as size or shape
Down
- 1. / a thing that is composed of two or more separate elements; a mixture
- 3. / the basic unit of a chemical element
- 4. / each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter
- 5. reaction / A process that produces a chemical change is called a