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other gases
Oxygen has 8 protons in the atom.
Water or H2O has exactly the number of atoms listed in each molecule: two hydrogen and one oxygen.
There are 8 electrons in a single neutral oxygen atom.The atomic number of oxygen is 8, because it has 8 protons in its nucleus. In an elemental, neutral, atom of oxygen the number of electrons will match the number of protons. There are 8 electrons in a neutral oxygen atom.Note that oxygen can become an ion under certain circumstances, and we need to specify the neutral atom to state how many electrons there are in oxygen.
2 hydrogen atoms and 1 oxygen atom
Every oxygen atom has eight electrons.
Oxygen's atomic number is 8. Thus it has 8 positively charged protons per atom. In order for oxygen to be neutral, it must also have 8 negatively charged electrons in each atom.
other gases
Every oxygen atom has eight electrons.
hydrogen atom 2 oxygen atom 1
Oxygen has 8 protons in the atom.
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.
There are 16 electrons in an oxygen molecule as each oxygen atom has 8 electrons.
Oxygen always has atomic number 8, but that has nothing directly to do with the rest of the question. The number of hydrogen atoms needed is 2, because that is what must be shared to fill the "outer shell" of both the oxygen atom and each hydrogen atom.
Water molecule (H2O) has 2 hydrogen atoms and 1 oxygen atom.
2 hydrogen atoms and 1 oxygen atom
Water or H2O has exactly the number of atoms listed in each molecule: two hydrogen and one oxygen.