you need two atoms depending how many electrons they want to get or get rid of like water hydrogen wants to give away one electron and oxygen wants to get two electrons that is how it becomes H2O
Energy
Ionic bonds form during chemical changes when atoms pull electrons away from other atoms. The atoms that lose electrons form ions that have fewer electrons than protons. So, an ion would be produced by an atom or a group of atoms that gained or lost one or more of its electrons.
In a non-polar covalent bond, each atom exerts the same pull on the electrons.
This does occur. The bonds begin to form when electrons from two different atoms begin to interact with other atoms until the two atoms become joined together.
Atoms become electrically charge when they reacting to one another. The two groups of charged atoms are cations (positively charged) and anions (negatively charged), and all together these types of atoms are called ions. The ability to become electrically charge depends on their electronegativity values and ionization energies. Electronegativity refers to an atom's "pull" on electrons, meaning that the more electronegative an atom is the harder it will "pull" on electrons from other atoms. The more electronegative atoms (typically the anions) reside on the far right side of the periodic table. Ionization energy refers to the energy needed to pluck an electron from an atom. Atoms with the lower energy typically have lower electronegativity values, making them cations (which are to the left of the periodic table).
Oxygen is one of the most electronegative elements in the biological world. This electronegativity is needed on the end of the electron transport chain. Electrons are passed from one complex or cytochrome to the next, and each successive molecule to be reduced needs to have a greater attraction for electrons than the last. So the end molecule, oxygen, needs to be electronegative enough to pull those electrons away, split and bond with two hydrogens to form water.
Ionic bonds form during chemical changes when atoms pull electrons away from other atoms. The atoms that lose electrons form ions that have fewer electrons than protons. So, an ion would be produced by an atom or a group of atoms that gained or lost one or more of its electrons.
Electronegativity
Oxygen atoms are highly electronegative and pull electrons away from the electropositive hydrogen atom.
In a nonpolar covalent bond both atoms exert the same pull on shared electrons. This differs from polar and ionic bonds.
electrons pair pull atoms apart
In a non-polar covalent bond, each atom exerts the same pull on the electrons.
This does occur. The bonds begin to form when electrons from two different atoms begin to interact with other atoms until the two atoms become joined together.
Oppositely charged atoms will stick together when forming an ionic bond which is a bond between a metal and nonmetal which makes them good conductors. The positive charge of a nonmetal will use its force to pull in the electrons of other atoms (metals) which is called electronegativity,"The ability to be able to pull in new electrons." hope i helped you:)
when atoms share electrons, the positive nucleus of each atom is attracted to the shared negative electrons. the pull between the positive and negative charges is the force that keeps these atoms joined......hope this hepls :)
Oppositely charged atoms will stick together when forming an ionic bond which is a bond between a metal and nonmetal which makes them good conductors. The positive charge of a nonmetal will use its force to pull in the electrons of other atoms (metals) which is called electronegativity,"The ability to be able to pull in new electrons." hope i helped you:)
Atoms of some elements pull more strongly on shared electrons than do atoms of other elements. As a result, the electrons are pulled more toward one atom, causing the bonded atoms to have slight electrical charges. These charges are not as strong as the charges on ions, however.
Polar bonds exist because certain atoms have a greater pull on the electrons in a bond than other atoms. The ability of an atom to attract electrons in a covalent bond is called "electronegativity". Atoms with a greater electronegativity will have a greater pull on the electrons in a bond than atoms with lower electronegativities. What this means for an electron is that it is not "shared" all that fairly. It will spend more time on the more electronegative atom than it will on the less electronegative atom (to a degree proportional to the difference in their electronegativity).