Atom Unit - Unit 1
Order by
12 terms
Terms | Definitions |
|---|---|
 Atom | The smallest unit of an element to retain its chemical and physical properties. |
| Proton | Positively charged, sub-atomic particle. |
| Neutron | Uncharged (neutral), sub-atomic particle. |
| Electron | Negatively charged, sub-atomic particle. |
| Fission | The process of breaking apart the nucleus of large atoms into smaller pieces; releases additional neutrons and energy. |
| Fusion | The process of combining the nuclei of smaller atoms to produce larger atoms; releases energy. |
| Element | A substance that cannot be separated or broken down into simpler substances by chemical means. |
| Compound | A substance made up of atoms of two or more different elements joined by chemical bonds. |
| Mixture | A combination of two or more substances that are not chemically bonded. |
| Radioactive decay | The breakdown of an unstable nucleus into one or more different pieces (nuclides). |
| Isotope | An atom with the same number of protons as other atoms of the same element, but a different number of neutrons. |
| Ion | An atom that has gained one or more electrons and has a negative or positive charge. |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.