Of or characterized by periods. The periodic motion of a planet. Occurring at regular intervals. Characterized by periodic sentences. Occurring, appearing, or recurring at regular intervals. Having or marked by repeated cycles. Group I elements have low ionization energies because the loss of an electron forms a stable octet.
Electron affinity reflects the ability of an atom to accept an electron. It is the energy change that occurs when an electron is added to a gaseous atom.
Atoms with stronger effective nuclear charge have greater electron affinity. Some generalizations can be made about the electron affinities of certain groups in the periodic table.
The Group IIA elements, the alkaline earths, have low electron affinity values. These elements are relatively stable because they have filled s subshells. Group VIIA elements, the halogens, have high electron affinities because the addition of an electron to an atom results in a completely filled shell. Group VIII elements, noble gases, have electron affinities near zero since each atom possesses a stable octet and will not accept an electron readily.
Elements of other groups have low electron affinities. In a period, the halogen will have the highest electron affinity, while the noble gas will have the lowest electron affinity. Electron affinity decreases moving down a group because a new electron would be further from the nucleus of a large atom.
Electronegativity is a measure of the attraction of an atom for the electrons in a chemical bond. The higher the electronegativity of an atom, the greater its attraction for bonding electrons. Electronegativity is related to ionization energy. Electrons with low ionization energies have low electronegativities because their nuclei do not exert a strong attractive force on electrons. Elements with high ionization energies have high electronegativities due to the strong pull exerted on electrons by the nucleus.
In a group, the electronegativity decreases as the atomic number increases, as a result of the increased distance between the valence electron and nucleus greater atomic radius. An example of an electropositive i. Actively scan device characteristics for identification. Love words? Need even more definitions? Homophones, Homographs, and Homonyms The same, but different. Merriam-Webster's Words of the Week - Nov. Ask the Editors 'Everyday' vs. What Is 'Semantic Bleaching'?
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What is the stair step line on a periodic table for? The stair step that is seen in the group of the representative element separates the metals from the non-metals. The right side of the stairs are the non-metals Carbon, Phosphorus, Sulphur, Chlorine, etc. What is a periodic function in chemistry? Also called Mendeleev's law. What is another name for a row on the periodic table? As with any grid, the periodic table has rows running left to right, and columns running up and down.
How many elements are in the periodic table? What is the synonym of periodic? What is an antonym for periodic? What chemical element is named after Cyprus? What is the Latin name of all elements?
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