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Cations are smaller then neutral atoms and anions are larger.
cations are smaller than the atoms from which they were formed because they lost an electron thus becoming smaller in size. anions are bigger than the atoms from which they were formed because they gained an electron and increasing in size. the greater the nuclear charge, the smaller they are. Source(s):general chemistry 4th edition textbook
Only the anion is greater than the atom because gained an electron.
Charge and Size
B. Negative ions. ( anions ) They have taken electron(s) into their valance shell and have increased their size this way.
Cations are smaller then neutral atoms and anions are larger.
Cations are formed when atoms lose electrons and hence are smaller in size than the corresponding atoms. Anions are formed when atoms gain electrons and hence are larger in size than the corresponding atoms.
cations are smaller than the atoms from which they were formed because they lost an electron thus becoming smaller in size. anions are bigger than the atoms from which they were formed because they gained an electron and increasing in size. the greater the nuclear charge, the smaller they are. Source(s):general chemistry 4th edition textbook
Cations and their parent atoms have the same number of protons in the nucleus but different numbers of electrons. As cations have less number of electrons, the effective nuclear charge increases and as such,the remaining electrons are more tightly bound by the nucleus. Thus, cations are smaller in size compared to their parent atoms.
Only the anion is greater than the atom because gained an electron.
Because electrons are gained.
anions always gain extra electrons casing the ionic radius to increase but cations remove electrons causing the ionic radius to decrease .therefore anionic radius is greater than cationic radius
Charge and Size
The size of an anion is larger than its parent atom because anions are formed due to the gain of electrons. When the electrons increase, there are still the same number of protons. The attractive force is thus reduced as there are the same number of protons attracting an increased number of electrons. This causes the electrons to not be bound as tightly to the nucleus resulting in an increase in size. In other words, anions have one or more extra electrons that contribute to the size of the atom. These extra electrons increase its size and make it larger than the neutral atom.
no. they become larger in size
yes atoms do double in size however atoms in helium are smaller because oxygen atoms double in size.
If you look at the structure of an atom you will see that the positive charges (protons), are secured in the centre (nucleus) of the atom along with the neutral charges (neutrons), while the negative charges (electrons) are situated in shells around the nucleus, and are therefore easier to get at.