The HNH angle is 107.8 0
a non polar covalent molecule
Valence electrons form the bonds between atoms in a molecule.
Two. One hydrogen atom has one valence electron, so two hydrogen atoms will have two valence electrons :)
A molecule shouldn't have valence electrons left.
Lewis dot diagrams represt the outer shell electrons covalently sharing between elements. For NF3 it would it would be pyramidal. Nitrogen has 5 outer shell electrons therefore you would attach the 3 fluorine atoms to the three outer shell electrons on the nitrogen. Then that leaves you with one non-bonding pair.
There is one lone pair of electrons in a molecule of ammonia: The single nitrogen atom in the molecule has five valence electrons; one of these is in a covalent bond with each of the three hydrogen atoms; and the remaining two valence electrons from the nitrogen atom constitute a lone pair.
6
It is aCovalent Bond
H2 is not an atom, it is a diatomic molecule. Each hydrogen atom has 1 valence electron. When two hydrogen atoms covalently bond to form an H2 molecule, there are two valence electrons being shared by the two atoms.
Three. Think of NH3 , ammonia. Nitrogen has a valence of three, Hydrogen's is one.
Hydrogen has a valency of 1
Hydrogen has a valence of 1.
a non polar covalent molecule
Zero. The valence of hydrogen is plus 1, and the valence of oxygen is minus 2. Water is H2O, i.e. each molecule of it consists of two hydrogen atoms combined with one oxygen atom. Adding the valences of the components, we obtain zero as water's valence (charge).
HCl has a single bond in between hydrogen and chlorine. Hydrogen's one and only electron is tied up in that bond. Chlorine's other 6 valence electrons are on that side due to chlorine's high electronegativity. So, the chlorine side will be negative and the hydrogen side will be positive. This makes HCl a highly polar molecule.
covalent
The atomic number for hydrogen (H) is 1 in the Periodic Table of Elements and it has that number of electrons (Valence & otherwise). Hence H2O for water since Oxygen O needs 2 electrons added to its valence electrons to make the stable compound WATER.