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17 Cards in this Set
- Front
- Back
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Valence electrons |
The electrons in the highest occupied energy level of an elements atoms |
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Electron dot structure |
Diagram that shows valence electrons in the atoms of an element as dots |
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octet rule |
It states that in forming compounds atoms tend to achieve the electron configuration of a noble gas |
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Ionic compound |
A compound composed of cations and anions |
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Ionic bonds |
The electrostatic forces that hold ions together and ionic compounds |
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Chemical formula |
It shows that the numbers of atoms of each element in the smallest representative |
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Formula unit |
The lowest whole-number ratio of ions in an ionic compound |
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Coordination number |
The number of ions of opposite charge that surround the ion in a crystal |
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Metallic bonds |
The forces of attraction between the free floating valence electrons and the positively charged metal ions |
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Alloys |
Mixtures of two or more elements, when at least one of which is metal |
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How do you find the number of valence electrons in an atom of a representative element? |
Look at its group number |
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How are cations formed? |
When an atom loses one or more valence electrons |
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How are anions formed? |
When an atom gains one or more valence electrons |
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What is the electrical charge of an ionic compound? |
Ionic compounds are electrically neutral |
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What are the three properties of ionic compounds? |
They are crystalline solids at room temperature, they have high melting points, and they can conduct an electric current when melted or dissolved in water |
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How can you model the valence electrons of metal atoms? |
They can be modeled as a sea of electrons |
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Why are alloys important? |
Their properties are often superior to those of their component elements |
