what is the chemical name and lewis structure of NO3 -2
The chemical name of NO3^-2 is nitrate ion. The Lewis structure represents the arrangement of the atoms in a molecule or ion and the distribution of electrons among them. To determine the Lewis structure of NO3^-2, we need to know the number of valence electrons for each element in the molecule.
NO3^-2 consists of one nitrogen (N) atom and three oxygen (O) atoms. Nitrogen is in Group 5A of the periodic table, so it has 5 valence electrons. Since there is one nitrogen atom in NO3^-2, we have 5 valence electrons for nitrogen.
Each oxygen atom is in Group 6A, so it has 6 valence electrons. Since there are three oxygen atoms in NO3^-2, we have 3 * 6 = 18 valence electrons for oxygen.
To find the total number of valence electrons for the nitrate ion, we sum up the valence electrons from each atom: 5 (nitrogen) + 18 (oxygen) + 2 (negative charge of the ion) = 25 valence electrons.
Now we can start placing the electrons in the Lewis structure. We first connect the atoms with single bonds, which in this case means nitrogen forms a single bond with each oxygen atom. Each single bond consists of two electrons, so we have used 6 electrons (3 bonds * 2 electrons).
Next, we distribute the remaining 19 electrons around the atoms, starting with the oxygen atoms, which try to fill their octets. We place 6 electrons (3 lone pairs) around each oxygen atom, which accounts for 18 electrons (3 oxygen atoms * 6 electrons).
Finally, we distribute the remaining 1 electron to nitrogen, which already has its octet filled.
The resulting Lewis structure for NO3^-2 is:
O
//
O = N = O
\\
O
The negative charge is located on the oxygen atom, indicating that the nitrate ion has a total charge of -2.
nitrate. We can't draw structures on this forum. Here is a link
https://www.google.com/search?q=lewis+structure+NO3^-&hl=en&client=firefox-a&hs=OxO&rls=org.mozilla:en-US:official&prmd=imvnsfd&tbm=isch&tbo=u&source=univ&sa=X&ei=cxJ3UO6aF6bR2QXrmYGABw&ved=0CCcQsAQ&biw=755&bih=433