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Westkost [7]
3 years ago
14

A fossil which has been preserved by it's replacement by minerals is called _______

Chemistry
2 answers:
german3 years ago
7 0
It's possible the answer is petrified fossil
natali 33 [55]3 years ago
3 0
The answer should be petrified fossil
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The structures shown by dots and lines to give the exact number of electrons in the outer most shell is explained by Lewis Structures.

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Lewis structures are those structures in which the diagram is shown using the electron representation. They are easy to understand as the diagram completely depicts where the electrons are shared and where they are transferred. The diagram also explains where there is a single bond and where there is a di covalent bond or tri covalent bond explaining where the single , double or triple electron pair is shared. The electrons are shown by dots or lines.

For example CCl₄ can be shown as follows

                  ..

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The picture shows that each chlorine has six electrons in its outer shell and then a pair of electron is shared with carbon forming a single covalent bond.

Similarly methane CH4 can also be shown.

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