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Chapter 6
Atomic Structure and Chemical Bonds
Term | Definition |
---|---|
Electron Cloud | Area where negatively charged electrons, arranged in energy levels, travel around an atom’s nucleus. |
Energy level | Different positions for an electron in an atom. |
Electron dot diagram | Chemical symbol for an element, surrounded by as many dots as there are electrons in its outer energy level. |
Chemical bond | Force that holds two atoms together. |
Ion | Atom that is positively or negatively charged because it has gained or lost electrons |
Ionic bond | Attraction that holds oppositely charged ions close together. |
Compound | A substance produced when elements combine and whose properties are different from each of the elements in it. |
Metallic bond | Bond formed when metal atoms share their pooled electrons. |
Covalent bond | Chemical bond formed when atoms share electrons |
Molecule | Neutral particle formed when atoms share electrons. |
Polar bond | Bond resulting from the unequal sharing of electrons. |
Chemical formula | Combination of chemical symbols and numbers that indicates which elements and how many atoms of each element are present in a molecule. |
Proton | Positively charge particle located in the nucleus of an atom and that is counted to identify the atomic number. |
Electron | Invisible, negatively charge particle located in a cloud-like formation that surrounds the nucleus of an atom |
Nucleus | Positively charged center of atom |
Positive ion | A charged atom that has lost one or more electrons |
Negative ion | A charged atom that has gained one or more electrons |
Symbol | Represents an element |
Formula | Combination of symbols |
Subscript | Represents number of atoms |
Valence Electrons | The electrons in the outermost shell of an atom. |