| Term | Definition |
|---|
| electron cloud | The area of space around the nucleus of an atom where the electrons travel. |
| neutral | The term used to describe an atom that does not have a charge. |
| ion | The term used to describe a charged atom. |
| electron configuration | The position of different electrons around the nucleus of an atom. |
| electron dot diagram | The symbol of an element surrounded by dots representing valence electrons. |
| valence electrons | The electrons in the last (highest) energy level of an atom. |
| chemical bond | Force that holds two atoms together. |
| ionic bond | The type of bond that forms when one atom loses (and another atom gains) electrons. |
| covalent bond | The type of bond that forms when two atoms share electrons. |
| compound | A pure substance containing two or more elements that are chemically bonded. |
| metallic bond | The type of bond that forms when metal atoms "pool" their electrons. |
| molecule | A neutral particle formed when two or more atoms are covalently bonded. |
| polar covalent bond | The type of bond formed when atoms share electrons unequally. |
| chemical formula | A combination of chemical symbols and numbers that shows which elements are present in a compound. |
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