2015年9月6日 · Hydrogen bonding occurs where hydrogen is bound to a strongly electronegative element, viz. F, O, or N. As a physical scientist you should look up a table of electronegativities and note the difference in electronegativity between oxygen and hydrogen versus carbon and hydrogen. Electronegativity is conceived to be the tendency of an atom in a bond to polarize (i.e. unequally share) electron ...

2016年12月28日 · "CH"_4 is nonpolar, both within each bond and as an overall molecule. Polarity can either be within a bond, when one atom "hogs" the electrons more than the other, or in the overall molecule, when all the electrons tend to "group" to one side of the molecule but not the other. A dipole simply refers to the two poles of a magnet. Similar to that, a chemical bond with a dipole suggests that one ...

2016年1月7日 · So, you know that the average #"C"-"H"# bond enthalpy is equal to #"414 kJ/mol"#. Notice that this value carries a positive sign. As you know, bond breaking is an endothermic process because it requires energy. This means that the value given to you corresponds to how much energy is needed, on average, in order to break a #"C"-"H"# bond.

2017年3月2日 · Lone Pairs In methane, the carbon has 4 valence electrons. It shares it with the one valance electron hydrogen has. This means it has 4 bonds. In ammonia, nitrogen has 5 valence electrons and shares 3 of them with the 3 hydrogens. This means that it has 3 bonds and 1 lone pair. A general note is that lone pairs occupy more space that regular bonds, which is why the bond angle for ammonia is a ...

2015年4月1日 · The carbon atom is bonded to four hydrogen atoms through four single bonds; each single bond is also a sigma bond, which means that methane has a total of 4 sigma bonds.![) Each of carbon's four #sp^(3)# hybrid orbitals bonds with a 1s-orbital from a …

2015年11月15日 · In this case, the #H-C-H# bond angle is #color(green)(109.5^@)#. Answer link. Related questions. Question ...

2017年2月5日 · A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. The electron pairs are shared between participating elements, these electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding. Example : In ...

Lewis structures (also known as Lewis dot diagrams, electron dot diagrams,"Lewis Dot formula" Lewis dot structures, and electron dot structures) are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. A Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. The Lewis structure ...

2018年3月19日 · Here's what I get. > Methane has both tetrahedral electron geometry and molecular geometry. Methane has four "sp"^3 orbitals, each pointing towards the corners of a regular tetrahedron with bond angles of 109.5°. Similarly, ammonia has a tetrahedral electron geometry. Ammonia has four "sp"^3 orbitals, each pointing towards the corners of a tetrahedron, with bond angles of 107° ( the bond ...

The charge clouds both methane, #CH_4#, and ammonia, #NH_3#, are arranged in a tetrahedral geometry. Why are the bond angles in methane 109.5 degrees while the bond angles in ammonia are 107.3 degrees?