H2Te
CH3CHO
CH3CN
H2Se
polar or nonpolar?
Also, anyone know any sites that show pics of the shape of molecules?
http://www.ausetute.com.au/shapemol.html
To determine if a molecule is polar or nonpolar, we need to consider its molecular geometry and the electronegativity difference between the atoms.
Let's analyze each molecule separately:
1. H2Te (Hydrogen telluride):
H2Te has a bent molecular geometry, with the central Te atom and two surrounding H atoms. Since Te is more electronegative than H, and the molecule has a bent shape, the electron distribution is asymmetrical, making H2Te a polar molecule.
2. CH3CHO (Acetaldehyde):
CH3CHO has a trigonal planar molecular geometry because the central C atom is bonded to three surrounding atoms (two H atoms and an O atom). The difference in electronegativity between C and H or C and O is not significant enough to create a polar molecule. Therefore, CH3CHO is considered a nonpolar molecule.
3. CH3CN (Acetonitrile):
CH3CN has a linear molecular geometry, with the central C atom bonded to the CH3 group on one side and the CN group on the other side. The electronegativity difference between C and H or C and N is not large enough to lead to a polar molecule. Hence, CH3CN is also a nonpolar molecule.
4. H2Se (Hydrogen selenide):
H2Se has a bent molecular geometry, similar to H2Te, with the central Se atom and two surrounding H atoms. Since Se is more electronegative than H, and the molecule has a bent shape, H2Se is a polar molecule.
As for sites that show pictures of molecular shapes, here are a few reliable options:
1. PubChem: https://pubchem.ncbi.nlm.nih.gov/
2. ChemSpider: https://www.chemspider.com/
3. MolView: https://molview.org/
These websites provide detailed molecular structures and visual representations of various compounds.
To determine whether a molecule is polar or nonpolar, you need to consider its molecular geometry.
1. H2Te (DiHydrogen Telluride):
To determine its shape, you should draw the Lewis structure first. In this case, Hydrogen (H) has one valence electron, and Tellurium (Te) has six valence electrons. When you connect two Hydrogen atoms with a single bond to a Tellurium atom and complete the octet for each atom, you will end up with a bent shape. Oxygen has two lone pairs on it, creating a bent shape. Due to the bent shape, H2Te is a polar molecule.
2. CH3CHO (Acetaldehyde):
To determine the shape, draw the Lewis structure of CH3CHO. Carbon (C) has four valence electrons, Hydrogen (H) has one, and Oxygen (O) has six. Connect the Hydrogen atoms to the Carbon atom and complete the octet for each atom. The resultant shape is trigonal planar. As there are no lone pairs present, the molecule is symmetric and nonpolar.
3. CH3CN (Acetonitrile):
Again, drawing the Lewis structure is necessary. Carbon (C) has four valence electrons, Hydrogen (H) has one, and Nitrogen (N) has five. Connect the Hydrogen atoms to the Carbon atom and add the remaining lone electron pair of Nitrogen. The molecular shape is linear, and there are no lone pairs. Therefore, CH3CN is a nonpolar molecule.
4. H2Se (DiHydrogen Selenide):
The Lewis structure for H2Se can be constructed using the same method as described above. Connect the Hydrogen atoms to the Selenium atom and complete the octet for each atom. The shape of H2Se is bent, similar to H2Te. Consequently, H2Se is also a polar molecule.
To find pictures of molecular shapes, you can use various online resources such as:
- ChemSpider (www.chemspider.com)
- PubChem (pubchem.ncbi.nlm.nih.gov)
- MolView (molview.org)
- ChemDoodle (www.chemdoodle.com/online)
These websites provide molecular structure visualizations that can help you understand and visualize the shapes of different molecules.