It is different for each element. In hydrogen, there is one.
A molecule of of H2O has 10 electrons: two from the hydrogen and 8 from the oxygen.
Water molecules are composed of two atoms of hydrogen and one atom of oxygen. The hydrogen atoms each bring an electron to the reaction, and the oxygen atom brings eight. The resulting molecule has two plus eight electrons, or ten electrons in it.
Hydrogen doesn't really have a valence shell. It has one electron only.
8
In water molecules there are 2 atoms of hydrogen of and 1 atom of oxygen present. each hydrogen atom shares 1 electron with the oxygen atom. So the total number of electrons shared with oxygen are 2,total no. of electrons shared by hydrogen is 2 and the total no. of electrons shared by each hydrogen atom is 1.
One of each.
2
It is different for each element. In hydrogen, there is one.
The number of neutrons will vary depending on the isotopes of hydrogen and oxygen in the molecule. The number of protons and electrons will be 10 each in every molecule.
A molecule of of H2O has 10 electrons: two from the hydrogen and 8 from the oxygen.
One of each. Total = 2.
There will be a total of 10 protons and 10 electrons (one from each hydrogen and eight from oxygen). The number of neutrons depends on the isotope of hydrogen and oxygen. And for the most stable isotopes of hydrogen and oxygen, there will be 10 neutrons in H2O.
Water molecules are composed of two atoms of hydrogen and one atom of oxygen. The hydrogen atoms each bring an electron to the reaction, and the oxygen atom brings eight. The resulting molecule has two plus eight electrons, or ten electrons in it.
Hydrogen doesn't really have a valence shell. It has one electron only.
The hydrogen ion H+ is without electrons.
Water is a molecule made of three atoms (one oxygen and two hydrogen) and the concept of the electron octet applies to atoms, not to molecules. Oxygen, with six valance electrons, can acquire an octet by sharing the electrons of two hydrogen atoms, each of which have one electron. So the water molecule is self contained, it does not need any more electrons.