Question
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To draw a covalent Lewis structure and to identify bonding and nonbonding electrons. When covalent compounds, such as water (H2O). form covalent bonds, they share valence electrons. A Lewis dot structure or electron dot structure is a drawing that represents chemical bonds between atoms as shared or transferred electrons, where the valence electrons are represented as dots. For example, notice the Lewis structure of NC13. When a pair of electrons is shared between two atoms, a line is drawn to indicate a bond. To draw a Lewis dot structure, follow these steps: Draw the skeletal structure of the molecule. The skeletal structure shows how the atoms of the molecule should be connected. For example, the skeletal structure of water is shown here: H O H Determine the number of electrons for the Lewis structure by summing the valence electrons of each atom in the molecule. Distribute the electrons among the atoms, giving octets (or duets for hydrogen) to as many atoms as possible. According to the octet rule. atoms transfer or share electrons to obtain an outer shell that contains eight electrons. It is important to note that some atoms, including hydrogen, do not follow the octet rule. Hydrogen is stable when it contains two electrons. If any atoms lack an octet, form double or triple bonds as necessary to give them octets. For neutral molecules, which statements about covalent Lewis structures are true? Drag each item to the appropriate bin.
Explanation / Answer
true
for neutral molecules, no. of electrons in lewis structure is sum of the valence electrons for the atoms
electrons of hte covalent compounds may be shared between atoms
false
each atom in lewis structure must have eight electrons
hydrogen atoms are often the central atom of a lewis structure
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