Atom lose electron to form positive ion and some gain electron to form negative ion.
be cause electron gaining atom is placed far to the atom s nueclius so that it does NT attract that at all ,&it escapes from the outermost orbital..........
Elements form ions by either gaining or losing valence electrons. The elements that lose electron(s) and gain electron(s) acquire a positive charge and negative charge respectively. The elements that lose and gain the least electrons require less ionization energy, and are more reactive than elements that need to lose or gain more electrons. For instance, elements in group 1 of the Periodic Table need to lose one electron, and are more reactive than elements in group 2 that need to lose 2 electrons.
Noble gases have a very stable structure, the outer shell of electrons is full.
Metal atoms form ions by losing valence electrons.
Some atoms gain or lose electrons to form ions because they like to maintain electro-stability . For example, certain atoms such as oxygen will gain electrons to become more stable so they do not react as bad as when their electron shell is not full .
Atoms do not always lose electrons. Electrons can be gained too. Atoms always try to have their outer most shell filled, and some atoms such as ones of potassium can easily lose an electron rather than gain an electron. So it would lose an electron to a different atom so that it would have a full outer shell and the other atom would also have a full outer shell.
When atoms combine with other atoms, some times they lose electrons, some times they gain electrons, and some times they share electrons. In an ionic bond, one atom will lose an electron(s), and the other will gain an electron(s). An example might be NaCl where Na loses an electron and Cl gains an electron. In a covalent bond, each atom provides an electron and both of them share the two electrons. An example of this might be H2O where each hydrogen provides one electron, and oxygen provides one electron to make the O-H bond.
because then it's balanced
be cause electron gaining atom is placed far to the atom s nueclius so that it does NT attract that at all ,&it escapes from the outermost orbital..........
they lose their outer electron to some other atom.
The premise of the question is false: A hydrogen atom does not always "prefer" to lose its electron in chemical reaction. Often the electron is shared to form a covalent bond, and in some instances, the polarity of covalent bond between hydrogen and some other atom has higher average negative charge than positive.
there is a rule called the "octet rule" which basically states that all atoms wish to acquire the formation of a noble gas. To do so, they must have 8 valence electrons which means that some elements prefer to gain or lose electrons depending on how many valence electrons they already have. For example sodium has one valence electron therefore it is easier for it to lose one electron then to gain 7 electrons. Now getting back to your question: the potassium atom and the chlorine atom both want to become noble gases and since potassium requires to lose one electron and chlorine requires to gain one electron they combine. This is ionic bonding.
The second electron gain of an oxygen atom would be expected to be less negative. The reason for this outcome is that the oxygen atom gaining a second electron already has one electron and thus a negative charge. This negative charge repels the second electron to some extent, making the enthalpy of this process less negative than when the first electron was added to the neutral oxygen atom.
Well, an atom that loses an electron does not just "lose" it in space, the electron is taken away by another atom or molecule. So the electron sticks to the new molecule and forms an ion with a charge (given that the original atom was a neutral one). When this happens inside the body some really dangerous compounds can be formed, these are called "free radicals"
lose an electron For an atom to become positively charged, it must lose electrons. However, oxygen is a non-metal and is an anion. Since it only needs one electron to complete its outer shell of valence electrons, it tends to gain electrons rather than lose them and forms covalent bonds (where electrons are shared). Outside of some circumstances
The valence electron in a lithium atom is in orbital 2s. To form a lithium cation, this electron is transferred to some more electronegative atom.
Elements form ions by either gaining or losing valence electrons. The elements that lose electron(s) and gain electron(s) acquire a positive charge and negative charge respectively. The elements that lose and gain the least electrons require less ionization energy, and are more reactive than elements that need to lose or gain more electrons. For instance, elements in group 1 of the Periodic Table need to lose one electron, and are more reactive than elements in group 2 that need to lose 2 electrons.