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Ch. 13 Chemical Bond
| Term | Definition |
|---|---|
| Chemical Bonding | the combining of atoms to form molecules or ironic compounds |
| Chemical Bond | An interaction that holds atoms or ions together |
| Valence electron | an electron that is found in the outermost shell of an atom and that determines the atom's chemical properties |
| Ionic Bond | A bond that forms when eletrons are transferred from one atom to another, which results in a posistive ion and a negative ion |
| ion | a charged particle that forms when an atom or group of atoms gains or loses one or more electrons |
| Crystal Lattice | The regular pattern in which a crystal is arranged |
| Convalent Bond | A bond formed when atoms share one or more pairs of electrons |
| Molecule | the smallest unit of substance that keeps all of the physical and chemical properties of that substance |
| Metallic Bond | A bond formed by the attraction between positively charged metal ions and the electrons around them |
| Which of the following substances results from combining atoms of carhbon, hydrogen, and oxygen? | Suger |
| Which of the following is not true about electrons when chemical bonds form? | Electron are destroyed |
| An explanation of a phenomenon that is based on observation, experimentation, and reasoning is a | theory |
| People can use _________ to discuss theories of how and why atons form bonds. | Model |
| How can you determine the number of electrons in an atom? | Atomic number |
| How many valence electrons are in an oxygen atom ? | 6 |
| What do elements within a group number have the same number of? | Valence electrons |
| An electron in the outermost energy level | valence electrons |
| number of protrons in an atom | atomic number |
| family on the periodic table to which an element belong | group |
| Which electrons in an atom make chemical bonds? Why? | Most atoms form bonds using only the electrons because the electrons are in the outermost. |
| How can the periodic table help you determine the number of valence electrons for atoms? | To determine the number of valence electrons for atoms |
| What determines whether an atom will form bonds? | Number of valence electrons |
| Which group on the periodic table contains elements that do not normally form chemical | Group 18 |
| The outermost energy level of an atom is considered full if the level contains ______ electrons | 8 |
| Helium atoms only need _____ valence electrons to have a filled outermost energy level | 2 |
| Which is more likely to form bonds, an atom with 8 valence electrons or an atom with less than 8 valence? | An atom with 8 valence electrons will be more likely to form bonds |
| A chemical bond that forms when electrons are transferred from one atom to another is an | ironic bond |
| Charged particles that form when atoms gain or lose electrons are | Ions |
| A transfer of electrons between atoms changes the number of electrons in an atom,but the _______ number of stays the same | Protons |
| Why is an atom neutral? | An atom is neutral becasue the number of electrons is an atom equals the number of protons |
| When atoms lose electrons throught an ionic bond, they become | positively charged |
| Most metals have few ___________ _________ and form positive ions | Valence Electrons |
| If a sodium atom loses its only valce electron to another atom, the sodium atom becomes a sodium ___________ | ion |
| A sodium ion has a charge of | protons |
| The chemical symbol for a sodium ion is | Na |
| When electrons pull away from atoms, ________ is needed | energy |
| Where does the energy needed to take electrons from metals come from? | Negative charged |
| Some atoms gain electrons during chemical changes and have a | Negative Charge |
| The symbol for oxide is O2-. How many electrons did the oxygen atom gain?2 | 2 |
| What ending is used for the names of negative ions? | -ide |
| Atoms of Group _______ electrons give off the most energy when they gain an electron | 17 |
| When is energy given off by most nonmetals? | When an ionic bond forms between a metal and a nonmetal |
| When ions bond, they form a repeating three-dimensional patterned | Crystal lattice |
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ilovelucy21
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